Question 1

A ball is thrown downward from the top of a building with an initial speed of 25 m/s.It hits the ground in 2.0 s.How high is the building?

Accepted Answer

A)  70 m 
B)  50 m 
C)  30 m 
D)  20 m 
A)  70 m 
B)  50 m 
C)  30 m 
D)  20 m

Question 2

The figure shows the graph of vx versus time for an object moving along the x-axis.Solve graphically for the distance traveled between t = 5.0 s and t = 9.0 s.

Accepted Answer

A)  110 m 
B)  120 m 
C)  100 m 
D)  130 m 
A)  110 m 
B)  120 m 
C)  100 m 
D)  130 m

Question 3

A mouse is running away from a cat at 0.75 m/s and,at 1.25 m from his mouse hole,he accelerates at a constant rate until he reaches his hole safely,0.75 s later.What acceleration did he undergo during the final 1.25 m of his escape?

Accepted Answer

A)  1.8 m/s2 
B)  1.2 m/s2 
C)  4.8 m/s2 
D)  2.4 m/s2 
E)  6.4 m/s2 
A)  1.8 m/s2 
B)  1.2 m/s2 
C)  4.8 m/s2 
D)  2.4 m/s2 
E)  6.4 m/s2

Question 4

Two masses are connected by a string which passes over a pulley with negligible mass and friction.One mass hangs vertically and one mass slides on a horizontal surface.The horizontal surface has a coefficient of kinetic friction of 0.200.The vertically hanging mass is 3.00 kg and the mass on the horizontal surface is 3.00 kg.The acceleration of the 4.00 kg mass is (the initial velocity of the horizontal mass is to the right)

Accepted Answer

A)  7.16 m/s2. 
B)  5.39 m/s2. 
C)  4.02 m/s2. 
D)  3.53 m/s2. 
E)  2.00 m/s2. 
A)  7.16 m/s2. 
B)  5.39 m/s2. 
C)  4.02 m/s2. 
D)  3.53 m/s2. 
E)  2.00 m/s2.

Question 5

If a flea can jump up to 45 cm above its initial resting point,with what speed is it able to leave the ground when jumping?

Accepted Answer

A)  2.1 m/s 
B)  3.0 m/s 
C)  8.8 m/s 
D)  4.2 m/s 
A)  2.1 m/s 
B)  3.0 m/s 
C)  8.8 m/s 
D)  4.2 m/s

Question 6

On the way to lower floors,an elevator begins its descent from rest at a constant acceleration,descending the first 5.0 m in 0.85 s.What is the apparent weight of a 75 kg man inside the accelerator during this time interval?

Accepted Answer

A)  0.74 kN 
B)  1.8 kN 
C)  0.30 kN 
D)  1.0 kN 
A)  0.74 kN 
B)  1.8 kN 
C)  0.30 kN 
D)  1.0 kN

Question 7

A projectile is projected from the origin with a velocity of 45.0 m/s at an angle of 30.0 degrees above the horizontal.What is the range of the projectile?

Accepted Answer

A)  92.0 m 
B)  105 m 
C)  134 m 
D)  179m 
E)  205 m 
A)  92.0 m 
B)  105 m 
C)  134 m 
D)  179m 
E)  205 m

Question 8

Two masses are connected by a string which passes over a pulley with negligible mass and friction.One mass hangs vertically and one mass slides on a 30.0 degrees frictionless incline.The vertically hanging mass is 6.00 kg and the mass on the incline is 4.00 kg.The acceleration of the 4.00 kg mass is

Accepted Answer

A)  1.98 m/s2. 
B)  3.92 m/s2. 
C)  5.75 m/s2. 
D)  6.86 m/s2. 
E)  7.84 m/s2. 
A)  1.98 m/s2. 
B)  3.92 m/s2. 
C)  5.75 m/s2. 
D)  6.86 m/s2. 
E)  7.84 m/s2.

Question 9

A sprinter runs 100.0 m.If he travels at constant acceleration of 1.95 m/s2 for the first 6.00 s and then at constant velocity for the remaining time,what was his average velocity?

Accepted Answer

A)  8.8 m/s 
B)  10.2 m/s 
C)  9.9 m/s 
D)  9.8 m/s 
A)  8.8 m/s 
B)  10.2 m/s 
C)  9.9 m/s 
D)  9.8 m/s

Question 10

One stone is dropped from the side of a bridge,and a second is dropped from the same place a short time later.What is true about the distance between the stones as a function of time after both have been dropped? Ignore air resistance

Accepted Answer

A)  Increases,finally reaching a constant value 
B)  Always increases 
C)  Is constant 
D)  Decreases,and then reaches a constant value 
E)  Always decreases 
A)  Increases,finally reaching a constant value 
B)  Always increases 
C)  Is constant 
D)  Decreases,and then reaches a constant value 
E)  Always decreases

Question 11

A projectile is projected from the origin with a velocity of 15.0 m/s at an angle of 30.0 degrees above the horizontal.What is the velocity of the projectile 2.00 seconds later?

Accepted Answer

A)  17.8 m/s at an angle of 38 degrees above the horizontal 
B)  11.4 m/s at an angle of 43 degrees below the horizontal 
C)  17.8 m/s at an angle of 43 degrees below the horizontal 
D)  11.4 m/s at an angle of 38 degrees below the horizontal 
E)  17.8 m/s at an angle of 43 degrees above the horizontal 
A)  17.8 m/s at an angle of 38 degrees above the horizontal 
B)  11.4 m/s at an angle of 43 degrees below the horizontal 
C)  17.8 m/s at an angle of 43 degrees below the horizontal 
D)  11.4 m/s at an angle of 38 degrees below the horizontal 
E)  17.8 m/s at an angle of 43 degrees above the horizontal

Question 12

Two masses are being pulled up a 30.0 degrees incline by a force F parallel to the incline.The acceleration down the incline is 1.00 m/s2 and the velocity is down the incline.The force is applied to a 200 kg mass and a string connects the 200 kg mass to a 150 kg mass.The coefficient of kinetic friction is 0.200.The force F is

Accepted Answer

A)  771 N. 
B)  875 N. 
C)  1,050 N. 
D)  1,960 N. 
E)  2,330 N. 
A)  771 N. 
B)  875 N. 
C)  1,050 N. 
D)  1,960 N. 
E)  2,330 N.

Question 13

A rocket is launched from the origin with an acceleration of 20.0 m/s2 at an angle of 30.0 degrees above the horizontal.The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted.The rocket then falls with an acceleration of 9.80 m/s2 downward.What is the maximum height?

Accepted Answer

A)  22.3 m 
B)  27.5 m 
C)  30.5 m 
D)  36.7 m 
E)  20.0 m 
A)  22.3 m 
B)  27.5 m 
C)  30.5 m 
D)  36.7 m 
E)  20.0 m

Question 14

A stone thrown horizontally from a cliff with an initial speed of 10 m/s hits the bottom of the cliff in 4.3 s.What is the height of the cliff?

Accepted Answer

A)  22 m 
B)  43 m 
C)  69 m 
D)  91 m 
A)  22 m 
B)  43 m 
C)  69 m 
D)  91 m

Question 15

Two masses are connected by a string which passes over a pulley with negligible mass and friction.One mass hangs vertically and one mass slides on a frictionless horizontal surface.The vertically hanging mass is 6.00 kg and the mass on the horizontal surface is 4.00 kg.The acceleration of the 4.00 kg mass is

Accepted Answer

A)  1.98 m/s2. 
B)  3.92 m/s2. 
C)  5.88 m/s2. 
D)  6.75 m/s2. 
E)  7.84 m/s2. 
A)  1.98 m/s2. 
B)  3.92 m/s2. 
C)  5.88 m/s2. 
D)  6.75 m/s2. 
E)  7.84 m/s2.

Question 16

A ball is dropped at time t = 0.0 s.At t = 2.0 s,a second ball is thrown downward with speed v.What is v if at t = 4.0 s,the two balls are at the same vertical position?

Accepted Answer

A)  15 m/s 
B)  25 m/s 
C)  49 m/s 
D)  29 m/s 
A)  15 m/s 
B)  25 m/s 
C)  49 m/s 
D)  29 m/s

Question 17

A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 45.0 degrees above the horizontal.What is the velocity and time when the projectile hits the ground?

Accepted Answer

A)  Vx = 21.2 m/s,Vy = -21.2 m/s at t = 4.33 s 
B)  Vx = 16.7 m/s,Vy = -16.7 m/s at t = 3.33 s 
C)  Vx = 21.1 m/s,Vy = -16.7 m/s at t = 2.83 s 
D)  Vx = 16.7 m/s,Vy = -21.2 m/s at t = 4.33 s 
E)  Vx = 21.2 m/s,Vy = -15.0 m/s at t = 3.33 s 
A)  Vx = 21.2 m/s,Vy = -21.2 m/s at t = 4.33 s 
B)  Vx = 16.7 m/s,Vy = -16.7 m/s at t = 3.33 s 
C)  Vx = 21.1 m/s,Vy = -16.7 m/s at t = 2.83 s 
D)  Vx = 16.7 m/s,Vy = -21.2 m/s at t = 4.33 s 
E)  Vx = 21.2 m/s,Vy = -15.0 m/s at t = 3.33 s

Exam 4: Motion With Constant Acceleration

A ball is thrown downward from the top of a building with an initial speed of 25 m/s.It hits the ground in 2.0 s.How high is the building?

The figure shows the graph of vx versus time for an object moving along the x-axis.Solve graphically for the distance traveled between t = 5.0 s and t = 9.0 s.

A mouse is running away from a cat at 0.75 m/s and,at 1.25 m from his mouse hole,he accelerates at a constant rate until he reaches his hole safely,0.75 s later.What acceleration did he undergo during the final 1.25 m of his escape?

If a flea can jump up to 45 cm above its initial resting point,with what speed is it able to leave the ground when jumping?

On the way to lower floors,an elevator begins its descent from rest at a constant acceleration,descending the first 5.0 m in 0.85 s.What is the apparent weight of a 75 kg man inside the accelerator during this time interval?

A projectile is projected from the origin with a velocity of 45.0 m/s at an angle of 30.0 degrees above the horizontal.What is the range of the projectile?

A sprinter runs 100.0 m.If he travels at constant acceleration of 1.95 m/s2 for the first 6.00 s and then at constant velocity for the remaining time,what was his average velocity?

One stone is dropped from the side of a bridge,and a second is dropped from the same place a short time later.What is true about the distance between the stones as a function of time after both have been dropped? Ignore air resistance

A projectile is projected from the origin with a velocity of 15.0 m/s at an angle of 30.0 degrees above the horizontal.What is the velocity of the projectile 2.00 seconds later?

A rocket is launched from the origin with an acceleration of 20.0 m/s2 at an angle of 30.0 degrees above the horizontal.The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted.The rocket then falls with an acceleration of 9.80 m/s2 downward.What is the maximum height?

A stone thrown horizontally from a cliff with an initial speed of 10 m/s hits the bottom of the cliff in 4.3 s.What is the height of the cliff?

A ball is dropped at time t = 0.0 s.At t = 2.0 s,a second ball is thrown downward with speed v.What is v if at t = 4.0 s,the two balls are at the same vertical position?

A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 45.0 degrees above the horizontal.What is the velocity and time when the projectile hits the ground?

Introduction

Force

Acceleration and Newtons Second Law of Motion

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Quantum Physics

Nuclear Physics

Particle Physics

Filters

The figure shows the graph of v_x versus time for an object moving along the x-axis.Solve graphically for the distance traveled between t = 5.0 s and t = 9.0 s.

A sprinter runs 100.0 m.If he travels at constant acceleration of 1.95 m/s² for the first 6.00 s and then at constant velocity for the remaining time,what was his average velocity?

A rocket is launched from the origin with an acceleration of 20.0 m/s² at an angle of 30.0 degrees above the horizontal.The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted.The rocket then falls with an acceleration of 9.80 m/s² downward.What is the maximum height?