two drivers, alison and kevin, are par- ticipating in a drag race. beginning from a standing start, they each proceed with a constant acceleration. alison covers the last 1>4 of the distance in 3 seconds, whereas kevin covers the last 1>3 of the distance in 4 seconds. who wins and by how much time?

Answer:

In Newton’s first law, an object at rest remains at rest until an external force isapplied. When I play soccer, the soccer ball will be at rest on the field (the initial condition) andremain in that spot on the field until I kick it (my muscles applying an external force to the ball).According to Newton’s second law, force = mass x acceleration (F=ma). When I kick the resting soccer ball, which has a given mass, it will accelerate in the direction that I kick it. From the equation, acceleration = force divided by mass. Therefore, since the mass of the soccer ball is fixed, the stronger my leg is and the more force I can apply to the ball, the faster it willaccelerate.According to Newton’s first law, an object in motion remains in motion until an external force isapplied. After I kick the soccer ball, it will continue in motion in the direction that I kicked it,but its acceleration will gradually slow down due to the external forces of friction from the airand the surface of the field. According to Newton’s third law, for every action there is an equal and opposite reaction.When I kick the soccer ball forward, if I also kick it in an upward direction, such as a thirty-degree angle from the field, it will come down at an angle when it strikes the field. When theball lands and strikes the field, there will be an equal and opposite reaction whereby instead oftraveling downward it will bounce of the surface of the field and will then be travelling upward.

For RC circuit: the value of the time constant τ is 12 μs.

For RL circuit: the value of the time constant τ is 0.115 ms.

It is proved that, τ = t1/2/ln(2) = 1.443 t1/2. This shows that the time constant is directly proportional to the square root of the half-life of the voltage decay.

For the RC circuit, the time constant τ is given by:

τ = RC = (10 nF)(1,200 Ω) = 12 μs

For the RL circuit, the time constant τ is given by:

τ = L/RL = (15 mH)/(130 Ω) = 0.115 ms

Now, for the RC circuit, the voltage across the capacitor can be given by:

vC(t) = Vmax(1 - e^(-t/τ))

where Vmax is the maximum voltage of the square wave, τ is the time constant, and t is the time. The voltage across the resistor is equal to vR(t) = vC(t), since the capacitor and resistor are in series.

For the RL circuit, the voltage across the resistor can be given by:

vR(t) = Vmax(1 - e^(-t/τ))

where Vmax is the maximum voltage of the square wave, τ is the time constant, and t is the time.

To show that τ = t1/2/ln(2), we start with the equation for voltage across the capacitor in the RC circuit:

vC(t) = Vmax(1 - e^(-t/τ))

Let t = τ, then we have:

vC(τ) = Vmax(1 - e^(-1))

vC(τ) = 0.632 Vmax

Now, let t = t1/2, then we have:

vC(t1/2) = Vmax(1 - e^(-t1/2/τ))

vC(t1/2) = Vmax(1 - e^(-1/2))

vC(t1/2) = 0.393 Vmax

The voltage across the resistor at t = τ and t = t1/2 can be found using the same equations as above.

Now, the half-life t1/2 is defined as the time it takes for the voltage to decay to half of its initial value. Thus, we have:

t1/2/τ = ln(2)

Solving for τ, we get:

τ = t1/2/ln(2) = 1.443 t1/2

This shows that the time constant is directly proportional to the square root of the half-life of the voltage decay.

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The projectile's top height is indicated by the number h. Max equals u squared x divided by 2 g. In this case, the initial horizontal velocity is maximized by u square at a rate of 6 meters per second square.

The projectile's top height is indicated by the number h. Max equals u squared x divided by 2 g. In this case, the initial horizontal velocity is maximized by u square at a rate of 6 meters per second square.

This rate is then multiplied by two to get 9.8 meters per second square, which equals 1.84 meters.

The projectile can only fly as high as this, then. Here, we already know that the projector is located at a distance of h from the ground, which is the height the projectile has reached from ground level. Please excuse the distance, the cannon is h feet above the ground.          

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Answer:

55

Explanation:

was moving at 25 miles per hour

The electric fields is always directed from higher potential to the lower potential.

The electric fields always aiming from the region of higher potential to the region of lower potential. So the force of electrostatic and the direction of the travel of electrons will be always from lower potential to the region of higher potential.

An electric field is defined as the physical field which covers the electrically charged particles and also they can apply force on all other charged particles.

So we can conclude that the electric fields is always directed from higher potential to the lower potential.

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The correct choices regarding the acceleration are: 1. The acceleration is a maximum when the object is instantaneously at rest, 4. The acceleration is a maximum when the displacement of the object is zero.

In simple harmonic motion (SHM), the acceleration of the object is directly related to its displacement and is given by the equation a = -ω²x, where a is the acceleration, ω is the angular frequency, and x is the displacement.

1. The acceleration is a maximum when the object is instantaneously at rest:

When the object is at the extreme points of its motion (maximum displacement), it momentarily comes to rest before reversing its direction. At these points, the velocity is zero, and therefore the acceleration is at its maximum magnitude.

2. The acceleration is a maximum when the displacement of the object is zero:

At the equilibrium position (where the object crosses the mean position), the displacement is zero. Substituting x = 0 into the acceleration equation, we find that the acceleration is also zero.

Therefore, the acceleration is a maximum when the object is instantaneously at rest and when the displacement of the object is zero.

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the complete question is:

An object is moving in a straightforward harmonic manner. What is accurate regarding the object's acceleration? Pick every option that fits.

1. The object is instantaneously at rest when the acceleration is at its maximum.

2. The acceleration is at its highest when the object's speed is at its highest.

3. When an object is moving at its fastest, there is no acceleration.

4-When the object's displacement is zero, the acceleration is at its highest.

5-The acceleration is greatest when the object's displacement is greatest.

Answer:

The law of conservation of mass is a fundamental principle of physics. According to this law, matter can be neither created nor destroyed. In other words, the mass of an object or collection of objects never changes, no matter how the parts are rearranged.

Hope it helps!!!

Answer:

their will be no change in this..

The law of conservation of mass is a fundamental principle of physics. According to this law, matter can be neither created nor destroyed. In other words, the mass of an object or collection of objects never changes, no matter how the parts are rearranged.

As a result, a constant speed means that there are equal and opposite forces acting on it. The phrase "consistent speed and direction" is preferable.

Because of unequal power or strength delivered to one side of an item, an imbalanced force causes a change in motion, speed, direction, or movements. In the situation of unbalanced forces, one side has more energy than the other, despite the fact that opposing sides have forces working against them.

The force of friction generated by a bicycle's tyres against the road is larger than the force of friction generated by the air in opposition. The bicycle advances.

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Explanation:

17)  the amount of work needed in Joules will be equal to the change in Kinetic Energy (1/2 m v^2)   of the car

      1/2 (100 kg) ( 5 ^2 - 11^2 ) = -4800 J

18)  K E = 1/2 m v^2 =   1/2 * 70 * 6^2 = 1260 J

The density of matter in a lead nucleus is 2.82 x 10¹⁷ kg/m³.

Lead nucleus is composed of protons and neutrons. The density of a nucleus is the mass of a nucleus divided by the volume occupied by the nucleus. The volume of a nucleus can be determined using the formula

(4/3)πr³,

where r is the radius of the nucleus. As the diameter of a lead nucleus is given as 14.2 fm, the radius of a nucleus can be calculated as follows:

radius = diameter/2

= 14.2 fm/2

= 7.1 fm

Hence, the volume of a lead nucleus can be calculated as:

(4/3)πr³ = (4/3)π(7.1 fm)³

= 1.57 x 10⁻⁴ fm³

As the mass of a lead nucleus is 3.15 x 10⁻²⁵ kg, the density of matter in a lead nucleus can be calculated as follows:

Density = Mass/Volume

= 3.15 x 10⁻²⁵ kg/1.57 x 10⁻⁴ fm³

= 2.82 x 10¹⁷ kg/m³

The density of matter in a lead nucleus is 2.82 x 10¹⁷ kg/m³.

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Answer:

Explanation:

Given:

m = 5·10⁻²⁷ kg

V₁ = 2·10⁵ m/s

V₂ = 4·10⁵ m/s

D = 10cm = 0.10m

_______________

a - ?

The change in kinetic energy is equal to the work:

Ek₂ - Ek₁ = F·D

m·V₂² / 2 - m·V₁² / 2 = F·D

(m/2)·(V₂² - V₁²)  = F·D

Force:

F = (m/2)·(V₂² - V₁²) / D

F =   m·(V₂² - V₁²) / (2·D)

F = (5·10⁻²⁷)·( (4·10⁵)² - (2·10⁵))/ (2·0.10) ≈ 3·10⁻¹⁴ N

Answer:Chuyển động đều là chuyển động có vận tốc không thay đổi theo thời gian

Explanation:

Answer:

Repeatability is how much variability in the measurement system is caused by the measurement device. Reproducibility is how much variability in the measurement system is caused by differences between operators.

Answer: Down below is the answer in complete sentences!

Explanation:

PART A:

Gravity and Acceleration are two additional forces acting upon the sled.

PART B:

Gravity will affect the sled by pulling it down, since the slope of the hill is negative.

Acceleration will affect the sled by gradually increasing it's speed, since the slope is downwards, which in addition to the initial force exerted plus gravity increases the speed, thus the sled accelerates.

The reading of the scale will increase.

Our fingers push away the water in the cup which requires a lot of force. The scale should apply the same force to your finger. This force increases the reading on the scale. The scale display will rise. When a finger is submerged, the water exerts an upward buoyant force on the finger.

According to Newton's third law fingers exert equal and opposite forces on water. The spring scale reading decreases until the object is completely submerged. The reading, therefore, shows the apparent weight of the stone, which is less than its actual weight. Heavy metals are denser than water and will sink in water, so putting heavy metals in water will change the reading on the spring scale.

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Answer:

306J

Explanation:

The formula for kinetic energy is given as ½mv².

Using this, we get our answer by substituting the values into the formula.

½ × 0.145kg × 65m/s

= 306.31J

can be rounded off to 306J

Therbligs are basic physical elements of motion used in methods time measurement exercises to analyze and measure work processes. They represent the smallest unit of time and the full range of motions required to complete a job.

Therbligs were introduced by Frank B. Gilbreth, an industrial engineer, as a means to analyze and improve work processes. They are used in methods time measurement exercises to break down a task or job into its fundamental motions. Each therblig represents a specific basic physical element of motion, such as grasp, position, release, search, transport, and so on. These elements can be combined in different sequences to represent the full range of motions required to complete a job. Therbligs are used to measure the time required to perform each individual motion, and by summing up the times for all therbligs involved, the total time to complete a job can be determined. By analyzing the therbligs involved in a task, engineers can identify inefficiencies, eliminate unnecessary motions, and streamline work processes to increase productivity and reduce fatigue or strain on workers.

Therefore, therbligs serve as a standardized method for measuring and evaluating work processes, allowing for improvements in efficiency and productivity. They represent both the smallest unit of time used in methods time measurement exercises (individual motions) and the largest unit of time (the full range of motions required to complete a job).

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Answer:

5824 yards^2

Explanation:

area = length x width

area = 112 x 52

area = 5824

Answer:

5824 squared yards

Explanation:

Answer:

Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. The object is called a projectile, and its path is called its trajectory. The motion of falling objects, as covered in Problem-Solving Basics for One-Dimensional Kinematics, is a simple one-dimensional type of projectile motion in which there is no horizontal movement. In this section, we consider two-dimensional projectile motion, such as that of a football or other object for which air resistance is negligible.

Explanation:

B the dropped ball

The approximate average force exerted by the pogo stick on the ground during the landing is 1960 N.

To calculate this force, we can use the principle of conservation of mechanical energy. The potential energy at the high point of the jump is converted into kinetic energy as the pogo stick descends.

The potential energy at the high point is given by the formula:

PE = m * g * h,

where m is the mass (80 kg), g is the acceleration due to gravity (approximately 9.8 m/s²), and h is the height (2.0 mm = 0.002 m).

PE = 80 kg * 9.8 m/s² * 0.002 m.

Next, we calculate the change in potential energy as the pogo stick descends:

ΔPE = PE_initial - PE_final,

where PE_initial is the potential energy at the high point and PE_final is the potential energy at the lowest point.

ΔPE = (80 kg * 9.8 m/s² * 0.002 m) - (80 kg * 9.8 m/s² * 0.0015 m).

The change in potential energy is converted into work done by the average force exerted on the ground. Since work is the product of force and distance, we can write:

ΔPE = F_avg * d,

where F_avg is the average force and d is the distance over which the force is applied.

Substituting the values:

(80 kg * 9.8 m/s² * 0.0015 m) = F_avg * (0.004 m).

Solving for F_avg:

F_avg = (80 kg * 9.8 m/s² * 0.0015 m) / (0.004 m).

F_avg ≈ 1960 N.

Therefore, the approximate average force exerted by the pogo stick on the ground during the landing is 1960 N.

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The acceleration of the plane will be −8 m/s²

How to find the acceleration of a plane?

Acceleration is the rate of change in velocity over time (Δv/t).

Given, that the initial velocity of the plane u=480 m/s

The final velocity of the plane is zero after landing, v= 0 m/s

t= 1 minute= 60 seconds

we know, v=u + at

0= 480 + 60a

a=\(\frac{-480}{60}\)  = -8m/s²

Thus, the acceleration of the plane is -8 m/s²

(negative acceleration implies that the object is slowing down)

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Both the assertion and the reason given are true.If the mass of the object is less, the acceleration produced by the force will be more. Hence, the acceleration produced by the force is directly proportional to the magnitude of the force and inversely proportional to the mass of the object.

The given assertion: When astronauts throw something in space, that object would continue moving in the same direction and with the same speed; and the given reason: The acceleration of an object produced by a net applied force is directly related to the magnitude of the force, and inversely related to the mass of the object are both correct.Astronauts are capable of throwing objects in space because they are beyond Earth's gravity and do not have to deal with any significant air resistance. In the absence of other forces like friction or air resistance, the initial velocity will be conserved, and the object will continue to move with the same speed and direction. The object would continue to move in a straight line with the same speed because no external force acts on it to change the object's state of motion.Newton's second law states that the force of an object is directly proportional to its acceleration, but inversely proportional to its mass. F=ma, where F is force, m is mass, and a is acceleration. Therefore, if the mass of the object is less, the acceleration produced by the force will be more. Hence, the acceleration produced by the force is directly proportional to the magnitude of the force and inversely proportional to the mass of the object.

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Answer:

Final velocity is the velocity which the body has at the end of the given time period.

Based on observations by the Dawn spacecraft, scientists have concluded that Vesta might be: D. one of the remnants of the planet that broke up to form the asteroid belt.

Based on observations by the Dawn spacecraft, scientists have concluded that Vesta might be a planetesimal leftover from the solar system's formation. Vesta is one of the largest asteroids in the asteroid belt between Mars and Jupiter. Its unique characteristics and composition provide insights into the early stages of our solar system.

Dawn's data reveals that Vesta is differentiated, meaning it has distinct layers and a core, which is consistent with its formation as a planetesimal. The spacecraft detected evidence of volcanic activity, impact craters, and the presence of basaltic lava flows on Vesta's surface. These features suggest that Vesta experienced a significant amount of geologic activity in the past.

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Answer:

no don't think so

Explanation:

JESUS CHRIST controls everything 100IQ

No, the moon does not directly control the waves in the ocean. The primary factors that influence the formation of waves in the ocean are wind and the interaction between wind and the water's surface.

The moon, however, does play a significant role in influencing the tides, which are the periodic rise and fall of the ocean's surface.

The gravitational force exerted by the moon, as well as the sun to a lesser extent, creates tidal bulges on the Earth. As the Earth rotates, these tidal bulges move around the planet, resulting in the daily cycle of high tides and low tides.

The gravitational pull of the moon is stronger on the side of the Earth facing the moon, causing a high tide, while on the opposite side, a high tide also occurs due to the centrifugal force resulting from the Earth's rotation. The areas in between experience low tides.

While tides can affect the height and intensity of ocean waves near the coastlines, the actual formation and behavior of waves are primarily driven by wind patterns, water depth, and other factors such as underwater topography.

Waves are generated when the wind transfers its energy to the water's surface, creating oscillations that propagate as waves. These waves can travel vast distances across the ocean, even in the absence of tidal influences.

In conclusion, while the moon's gravitational pull influences the tides, it does not directly control or generate the waves in the ocean.

Waves are primarily driven by wind and other factors, whereas tides are the result of gravitational forces acting on the Earth's oceans.

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Answer:

-50N/m

Explanation:

Force , F = 15N

Displacement , x = 0.3m

Spring constant , K = ?

K = -F/x

K = -15N/0.3m

K = -50N/m

Answer: 50 N/m

Explanation:

Edge 2022

Answer:

i dont know them

Explanation: