From the edge of a roof top you toss a green ball upwards with initial speed v0 and a blue ball downwards with the same initial speed.Neglect air.When they reach the ground below

A) the green ball will be moving faster than the blue ball. B) the blue ball will be moving faster than the green ball. C) the two balls will have the same speed. A) the green ball will be moving faster than the blue ball. B) the blue ball will be moving faster than the green ball. C) the two balls will have the same speed.

A light-year is the distance that light travels in one year.The speed of light is 3.00 × 108 m/s.How many miles are there in one light-year? (1 mi = 1609 m,1 y = 365 d)

A) 9.46 × 1012 mi B) 9.46 × 1015 mi C) 5.88 × 1012 mi D) 5.88 × 1015 mi A) 9.46 × 1012 mi B) 9.46 × 1015 mi C) 5.88 × 1012 mi D) 5.88 × 1015 mi

An airplane starts from rest and accelerates at a constant 10.8 m/s2.What is its speed at the end of a 400 m-long runway?

A) 37.0 m/s B) 93.0 m/s C) 65.7 m/s D) 4320 m/s E) 186 m/s A) 37.0 m/s B) 93.0 m/s C) 65.7 m/s D) 4320 m/s E) 186 m/s

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and there is no air.If the 10-kg rock reaches a maximum height h,what maximum height will the 20-kg ball reach?

A) h/4 B) h/2 C) h D) 2h E) 4h A) h/4 B) h/2 C) h D) 2h E) 4h

Exam 2: Kinematics: Motion in One Dimension

A 10-kg rock and a 20-kg rock are dropped at the same time and there is no air.If the 10-kg rock falls with acceleration a,what is the acceleration of the 20-kg rock?

(Multiple Choice)

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Question 41

The graph in the figure shows the position of a particle as it travels along the x-axis. At what value of t is the speed of the particle equal to 0 m/s?

(Multiple Choice)

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Question 42

At the same moment,one rock is dropped and one is thrown downward with an initial velocity of $29 \mathrm {~m} / \mathrm { s }$ from the top of a building that is 300 m tall.How much earlier does the thrown rock strike the ground? Neglect air resistance.

(Short Answer)

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Question 43

A certain test car can go from rest to 32.0 m/s in 3.88 s.The same car can come to a full stop from that speed in 4.14 s.What is the ratio of the magnitude of the starting acceleration to the stopping acceleration?

(Multiple Choice)

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Question 44

From the edge of a roof top you toss a green ball upwards with initial speed v₀ and a blue ball downwards with the same initial speed.Neglect air.When they reach the ground below

(Multiple Choice)

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Question 45

A soccer ball is released from rest at the top of a grassy incline.After 6.4 seconds the ball has rolled 91 m with constant acceleration,and 1.0 s later it reaches the bottom of the incline. (a)What was the ball's acceleration? (b)How long was the incline?

(Short Answer)

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Question 46

If the velocity versus time graph of an object is a straight line making an angle of +30° (counter clockwise)with the time axis,the object is

(Multiple Choice)

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Question 47

If the velocity of an object is zero at some point,then its acceleration must also be zero at that point.

(True/False)

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Question 48

The graph in the figure shows the position of a particle as it travels along the x-axis.What is the magnitude of the average speed of the particle between t = 1.0 s and t = 4.0 s?

(Multiple Choice)

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Question 49

A light-year is the distance that light travels in one year.The speed of light is 3.00 × 10⁸ m/s.How many miles are there in one light-year? (1 mi = 1609 m,1 y = 365 d)

(Multiple Choice)

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Question 50

A ball is thrown straight up with a speed of 30 m/s,and you can neglect the presence of air. (a)How long does it take the ball to reach the maximum height? (b)What is the maximum height reached by the ball? (c)What is its speed after 4.2 s?

(Short Answer)

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Question 51

A ball is thrown straight up,reaches a maximum height,then falls to its initial height.Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?

(Multiple Choice)

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Question 52

An airplane starts from rest and accelerates at a constant 10.8 m/s².What is its speed at the end of a 400 m-long runway?

(Multiple Choice)

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Question 53

The graph in the figure represents the velocity of a particle as it travels along the x-axis.What is the average acceleration of the particle between t = 2.0 s and t = 4.0 s?

(Short Answer)

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Question 54

A car is traveling with a constant speed when the driver suddenly applies the brakes,causing the car to slow down with a constant acceleration of magnitude 3.50 m/s².If the car comes to a stop in a distance of 30.0 m,what was the car's original speed?

(Multiple Choice)

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Question 55

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v₀ and there is no air.If the 10-kg rock reaches a maximum height h,what maximum height will the 20-kg ball reach?

(Multiple Choice)

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Question 56

Suppose that a car traveling to the west (-x direction)begins to slow down as it approaches a traffic light.Which statement concerning its acceleration must be correct?

(Multiple Choice)

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Question 57

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s,how far do you travel during this inattentive period?

(Multiple Choice)

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Question 58

A cart starts from rest and accelerates uniformly at 4.0 m/s² for 5.0 s.It next maintains the velocity it has reached for 10 s.Then it slows down at a steady rate of 2.0 m/s² for 4.0 s.What is the final speed of the car?

(Multiple Choice)

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Question 59

Which of the following quantities has units of a displacement? (There could be more than one correct choice.)

(Multiple Choice)

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Question 60

Showing 41 - 60 of 162

Exam 2: Kinematics: Motion in One Dimension

A 10-kg rock and a 20-kg rock are dropped at the same time and there is no air.If the 10-kg rock falls with acceleration a,what is the acceleration of the 20-kg rock?

The graph in the figure shows the position of a particle as it travels along the x-axis. At what value of t is the speed of the particle equal to 0 m/s?

At the same moment,one rock is dropped and one is thrown downward with an initial velocity of 29 m/s29 \mathrm {~m} / \mathrm { s }29 m/s from the top of a building that is 300 m tall.How much earlier does the thrown rock strike the ground? Neglect air resistance.

A certain test car can go from rest to 32.0 m/s in 3.88 s.The same car can come to a full stop from that speed in 4.14 s.What is the ratio of the magnitude of the starting acceleration to the stopping acceleration?

From the edge of a roof top you toss a green ball upwards with initial speed v0 and a blue ball downwards with the same initial speed.Neglect air.When they reach the ground below

A soccer ball is released from rest at the top of a grassy incline.After 6.4 seconds the ball has rolled 91 m with constant acceleration,and 1.0 s later it reaches the bottom of the incline. (a)What was the ball's acceleration? (b)How long was the incline?

If the velocity versus time graph of an object is a straight line making an angle of +30° (counter clockwise)with the time axis,the object is

If the velocity of an object is zero at some point,then its acceleration must also be zero at that point.

The graph in the figure shows the position of a particle as it travels along the x-axis.What is the magnitude of the average speed of the particle between t = 1.0 s and t = 4.0 s?

A light-year is the distance that light travels in one year.The speed of light is 3.00 × 108 m/s.How many miles are there in one light-year? (1 mi = 1609 m,1 y = 365 d)

A ball is thrown straight up with a speed of 30 m/s,and you can neglect the presence of air. (a)How long does it take the ball to reach the maximum height? (b)What is the maximum height reached by the ball? (c)What is its speed after 4.2 s?

A ball is thrown straight up,reaches a maximum height,then falls to its initial height.Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?

An airplane starts from rest and accelerates at a constant 10.8 m/s2.What is its speed at the end of a 400 m-long runway?

The graph in the figure represents the velocity of a particle as it travels along the x-axis.What is the average acceleration of the particle between t = 2.0 s and t = 4.0 s?

A car is traveling with a constant speed when the driver suddenly applies the brakes,causing the car to slow down with a constant acceleration of magnitude 3.50 m/s2.If the car comes to a stop in a distance of 30.0 m,what was the car's original speed?

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and there is no air.If the 10-kg rock reaches a maximum height h,what maximum height will the 20-kg ball reach?

Suppose that a car traveling to the west (-x direction)begins to slow down as it approaches a traffic light.Which statement concerning its acceleration must be correct?

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s,how far do you travel during this inattentive period?

A cart starts from rest and accelerates uniformly at 4.0 m/s2 for 5.0 s.It next maintains the velocity it has reached for 10 s.Then it slows down at a steady rate of 2.0 m/s2 for 4.0 s.What is the final speed of the car?

Which of the following quantities has units of a displacement? (There could be more than one correct choice.)

Introduction

Newtonian Mechanics

Applying Newtons Laws

Circular Motion

Impulse and Linear Momentum

Work and Energy

Extended Bodies at Rest

Rotational Motion

Gases

Static Fluids

Fluids in Motion

First Law of Thermodynamics

Second Law of Thermodynamics

Electric Charge force and Energy

The Electric Field

Dc Circuits

Magnetism

Electromagnetic Induction

Vibrational Motion

Mechanical Waves

Reflection and Refraction

Mirrors and Lenses

Wave Optics

Electromagnetic Waves

Special Relativity

Quantum Optics

Atomic Physics

Nuclear Physics

Particle Physics

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At the same moment,one rock is dropped and one is thrown downward with an initial velocity of $29 \mathrm {~m} / \mathrm { s }$ from the top of a building that is 300 m tall.How much earlier does the thrown rock strike the ground? Neglect air resistance.

From the edge of a roof top you toss a green ball upwards with initial speed v₀ and a blue ball downwards with the same initial speed.Neglect air.When they reach the ground below

A light-year is the distance that light travels in one year.The speed of light is 3.00 × 10⁸ m/s.How many miles are there in one light-year? (1 mi = 1609 m,1 y = 365 d)

An airplane starts from rest and accelerates at a constant 10.8 m/s².What is its speed at the end of a 400 m-long runway?

A car is traveling with a constant speed when the driver suddenly applies the brakes,causing the car to slow down with a constant acceleration of magnitude 3.50 m/s².If the car comes to a stop in a distance of 30.0 m,what was the car's original speed?

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v₀ and there is no air.If the 10-kg rock reaches a maximum height h,what maximum height will the 20-kg ball reach?

A cart starts from rest and accelerates uniformly at 4.0 m/s² for 5.0 s.It next maintains the velocity it has reached for 10 s.Then it slows down at a steady rate of 2.0 m/s² for 4.0 s.What is the final speed of the car?