Question 1

The graph shows the force on an object as it moves a distance x.What is the work done by the force when the object moves from 0.0 m to 4.0 m?

Accepted Answer

A)  6.0 J 
B)  8.0 J 
C)  10 J 
D)  12 J 
E)  14 J 
A)  6.0 J 
B)  8.0 J 
C)  10 J 
D)  12 J 
E)  14 J

Question 2

A spring-powered dart gun is un-stretched and has a spring constant 100 N/m.The spring is compressed by 8.00 cm and a 5.00 gram projectile is placed in the gun.The maximum height of the projectile when it is shot straight up from the gun is

Accepted Answer

A)  7.57 m. 
B)  7.00 m. 
C)  6.53 m. 
D)  6.00 m. 
E)  5.50 m. 
A)  7.57 m. 
B)  7.00 m. 
C)  6.53 m. 
D)  6.00 m. 
E)  5.50 m.

Question 3

A 2.00 kg pendulum bob on a string 1.50 m long,is released with a velocity of 2.00 m/s when the support string makes an angle of 30.0 degrees with the vertical.What is the velocity of the bob at the bottom of the swing?

Accepted Answer

A)  4.32 m/s 
B)  4.00 m/s 
C)  3.75 m/s 
D)  3.04 m/s 
E)  2.81 m/s 
A)  4.32 m/s 
B)  4.00 m/s 
C)  3.75 m/s 
D)  3.04 m/s 
E)  2.81 m/s

Question 4

A 75.0 kg skier slides down a 75.0 m high slope without friction.The velocity of the skier at the bottom of the slope is

Accepted Answer

A)  20.6 m/s. 
B)  29.7 m/s. 
C)  38.3 m/s. 
D)  40.5 m/s. 
E)  50.0 m/s. 
A)  20.6 m/s. 
B)  29.7 m/s. 
C)  38.3 m/s. 
D)  40.5 m/s. 
E)  50.0 m/s.

Question 5

A 20.0 kg box slides down a 12.0 m long incline at an angle of 30.0 degrees with the horizontal.A force of 50.0 N is applied to the box in the upward direction.The applied force F makes an angle of 0.00 to the incline.If the incline has a coefficient of kinetic friction of 0.000,then the increase in the kinetic energy of the box is

Accepted Answer

A)  620 J. 
B)  576 J. 
C)  542 J. 
D)  500 J. 
E)  475 J. 
A)  620 J. 
B)  576 J. 
C)  542 J. 
D)  500 J. 
E)  475 J.

Question 6

A spring-powered dart gun is un-stretched and has a spring constant 16.0 N/m.The spring is compressed by 8.00 cm and a 5.00 gram projectile is placed in the gun.The velocity of the projectile when it is shot from the gun is

Accepted Answer

A)  2.04 m/s. 
B)  2.75 m/s. 
C)  3.50 m/s. 
D)  3.75 m/s 
E)  4.53 m/s. 
A)  2.04 m/s. 
B)  2.75 m/s. 
C)  3.50 m/s. 
D)  3.75 m/s 
E)  4.53 m/s.

Question 7

A 2.00 kg pendulum bob on a string 1.50 m long,is released with a velocity of 3.00 m/s when the support string makes an angle of 45.0 degrees with the vertical.What is the angle with the vertical the bob makes at the highest point of its motion?

Accepted Answer

A)  47.5 degrees 
B)  50.0 degrees 
C)  59.8 degrees 
D)  66.4 degrees 
E)  75.3 degrees 
A)  47.5 degrees 
B)  50.0 degrees 
C)  59.8 degrees 
D)  66.4 degrees 
E)  75.3 degrees

Question 8

A car has a mass of 2,000 kg and travels at 20.0 m/s.If the drag force is 100 N,the power the engines have to provide to keep moving at constant speed is

Accepted Answer

A)  2.0 kW. 
B)  2.9 kW. 
C)  3.4 kW. 
D)  3.9 kW. 
E)  4.2 kW. 
A)  2.0 kW. 
B)  2.9 kW. 
C)  3.4 kW. 
D)  3.9 kW. 
E)  4.2 kW.

Question 9

A 2000 kg car accelerates up to a velocity of 40 m/s in 5.0 seconds.The brakes are applied,and the car is brought to a stop.The work done by the friction in the brakes is

Accepted Answer

A)  1.0 $\times$ 106 J. 
B)  1.2 $\times$ 106 J. 
C)  1.6 $\times$ 106 J. 
D)  2.1 $\times$ 106 J. 
E)  2.5 $\times$ 106 J. 
A)  1.0 $\times$ 106 J. 
B)  1.2 $\times$ 106 J. 
C)  1.6 $\times$ 106 J. 
D)  2.1 $\times$ 106 J. 
E)  2.5 $\times$ 106 J.

Question 10

A road bicycle racer rides down the highway from Pike's peak.During one stretch of the ride,he descends 150 m while accelerating from 35 km/hr to some final speed.Assuming rolling friction and air resistance to be negligible,what is that final speed?

Accepted Answer

A)  113 km/h 
B)  118 km/h 
C)  148 km/h 
D)  169 km/h 
A)  113 km/h 
B)  118 km/h 
C)  148 km/h 
D)  169 km/h

Question 11

An 8000 kg satellite is launched from the surface of the earth,and injected into outer space a long distance from the earth.The initial velocity needed to launch the satellite into outer space is (G = 6.67 $\times$ 10-11 Nm2/kg2, Me = 5.98 $\times$ 1024 kg, Re = 6.38 $\times$ 106 m)

Accepted Answer

A)  8,450 m/s. 
B)  9,200 m/s. 
C)  11,180 m/s. 
D)  18,900 m/s. 
E)  25,200 m/s. 
A)  8,450 m/s. 
B)  9,200 m/s. 
C)  11,180 m/s. 
D)  18,900 m/s. 
E)  25,200 m/s.

Question 12

An 8000 kg satellite is launched from the surface of the earth,and injected into a circular orbit at an altitude of 100 km above the surface of the earth.The gravitational potential energy of the satellite in the circular orbit is (G = 6.67 $\times$ 10-11 Nm2/kg2, Me = 5.98 $\times$ 1024 kg, Re = 6.38 $\times$ 106 m)

Accepted Answer

A)  5.01 $\times$ 1011 J. 
B)  4.92 $\times$ 1011 J. 
C)  4.75 $\times$ 1011 J. 
D)  4.02 $\times$ 1011 J. 
E)  3.85 $\times$ 1011 J. 
A)  5.01 $\times$ 1011 J. 
B)  4.92 $\times$ 1011 J. 
C)  4.75 $\times$ 1011 J. 
D)  4.02 $\times$ 1011 J. 
E)  3.85 $\times$ 1011 J.

Question 13

As a hiker descends a hill,the work done by gravity on the hiker is

Accepted Answer

A)  positive and depends on the path taken. 
B)  negative and depends on the path taken. 
C)  positive and independent of the path taken. 
D)  negative and independent of the path taken. 
A)  positive and depends on the path taken. 
B)  negative and depends on the path taken. 
C)  positive and independent of the path taken. 
D)  negative and independent of the path taken.

Question 14

During a basketball game,a player shoots a ball from half-court.When the ball reaches a height of 4.5 m above the floor,it is moving at 5.0 m/s.Assuming the shot was perfectly made,it will pass through the rim of the basket,3.05 m above the floor.How fast the ball moving when it passes through the rim?

Accepted Answer

A)  7.7 m/s 
B)  7.3 m/s 
C)  9.2 m/s 
D)  5.3 m/s 
A)  7.7 m/s 
B)  7.3 m/s 
C)  9.2 m/s 
D)  5.3 m/s

Question 15

The most fundamental forms of energy are

Accepted Answer

A)  elastic,gravitational,internal. 
B)  kinetic,potential,rest. 
C)  electromagnetic,chemical,nuclear. 
D)  translational,rotational,vibrational. 
A)  elastic,gravitational,internal. 
B)  kinetic,potential,rest. 
C)  electromagnetic,chemical,nuclear. 
D)  translational,rotational,vibrational.

Question 16

A spring with a spring constant of 8.0 N/m is initially compressed to 5.0 cm.The work done as it is compressed another 15 cm,to a total compression of 20 cm,is

Accepted Answer

A)  0.85 J. 
B)  0.54 J. 
C)  0.25 J. 
D)  0.15 J. 
E)  0.09 J. 
A)  0.85 J. 
B)  0.54 J. 
C)  0.25 J. 
D)  0.15 J. 
E)  0.09 J.

Question 17

A 1.1 kg seagull takes off from a piling along the California coast and accelerates within 0.50s to a flight speed of 7.5m/s along a horizontal path.What average power was developed by the bird's wings as it accelerated?

Accepted Answer

A)  62W 
B)  8.3W 
C)  33W 
D)  250W 
A)  62W 
B)  8.3W 
C)  33W 
D)  250W

Question 18

A blob of clay,mass M,is dropped onto a spring from a height h above the end of the spring.If the spring compresses an amount d as the blob comes to rest,what is the spring constant?

Accepted Answer

A)  2mgh/d2 
B)  mgh/d2 
C)  mg(h+d)/d2 
D)  2mg(h+d)/d2 
A)  2mgh/d2 
B)  mgh/d2 
C)  mg(h+d)/d2 
D)  2mg(h+d)/d2

Question 19

A horizontal force of 12 Newtons is applied to a 4.0 kg box that slides on a horizontal surface.The box starts from rest moves a horizontal distance of 10 meters and obtains a velocity of 5.0 m/s.The surface has friction.The friction force is

Accepted Answer

A)  7.0 N. 
B)  6.5 N. 
C)  6.0 N. 
D)  5.7 N. 
E)  4.9 N. 
A)  7.0 N. 
B)  6.5 N. 
C)  6.0 N. 
D)  5.7 N. 
E)  4.9 N.

Question 20

A spring-powered dart gun is un-stretched and has a spring constant 12.0 N/m.The spring is compressed by 8.00 cm and a 5.00 gram projectile is placed in the gun.The velocity of the projectile when it is shot from the gun is

Accepted Answer

A)  1.52 m/s. 
B)  2.54 m/s. 
C)  3.92 m/s. 
D)  4.24 m/s. 
E)  5.02 m/s. 
A)  1.52 m/s. 
B)  2.54 m/s. 
C)  3.92 m/s. 
D)  4.24 m/s. 
E)  5.02 m/s.

Exam 6: Conservation of Energy

The graph shows the force on an object as it moves a distance x.What is the work done by the force when the object moves from 0.0 m to 4.0 m?

A spring-powered dart gun is un-stretched and has a spring constant 100 N/m.The spring is compressed by 8.00 cm and a 5.00 gram projectile is placed in the gun.The maximum height of the projectile when it is shot straight up from the gun is

A 2.00 kg pendulum bob on a string 1.50 m long,is released with a velocity of 2.00 m/s when the support string makes an angle of 30.0 degrees with the vertical.What is the velocity of the bob at the bottom of the swing?

A 75.0 kg skier slides down a 75.0 m high slope without friction.The velocity of the skier at the bottom of the slope is

A spring-powered dart gun is un-stretched and has a spring constant 16.0 N/m.The spring is compressed by 8.00 cm and a 5.00 gram projectile is placed in the gun.The velocity of the projectile when it is shot from the gun is

A 2.00 kg pendulum bob on a string 1.50 m long,is released with a velocity of 3.00 m/s when the support string makes an angle of 45.0 degrees with the vertical.What is the angle with the vertical the bob makes at the highest point of its motion?

A car has a mass of 2,000 kg and travels at 20.0 m/s.If the drag force is 100 N,the power the engines have to provide to keep moving at constant speed is

A 2000 kg car accelerates up to a velocity of 40 m/s in 5.0 seconds.The brakes are applied,and the car is brought to a stop.The work done by the friction in the brakes is

A road bicycle racer rides down the highway from Pike's peak.During one stretch of the ride,he descends 150 m while accelerating from 35 km/hr to some final speed.Assuming rolling friction and air resistance to be negligible,what is that final speed?

An 8000 kg satellite is launched from the surface of the earth,and injected into outer space a long distance from the earth.The initial velocity needed to launch the satellite into outer space is (G = 6.67 ×\times× 10-11 Nm2/kg2, Me = 5.98 ×\times× 1024 kg, Re = 6.38 ×\times× 106 m)

As a hiker descends a hill,the work done by gravity on the hiker is

The most fundamental forms of energy are

A spring with a spring constant of 8.0 N/m is initially compressed to 5.0 cm.The work done as it is compressed another 15 cm,to a total compression of 20 cm,is

A 1.1 kg seagull takes off from a piling along the California coast and accelerates within 0.50s to a flight speed of 7.5m/s along a horizontal path.What average power was developed by the bird's wings as it accelerated?

A blob of clay,mass M,is dropped onto a spring from a height h above the end of the spring.If the spring compresses an amount d as the blob comes to rest,what is the spring constant?

A horizontal force of 12 Newtons is applied to a 4.0 kg box that slides on a horizontal surface.The box starts from rest moves a horizontal distance of 10 meters and obtains a velocity of 5.0 m/s.The surface has friction.The friction force is

A spring-powered dart gun is un-stretched and has a spring constant 12.0 N/m.The spring is compressed by 8.00 cm and a 5.00 gram projectile is placed in the gun.The velocity of the projectile when it is shot from the gun is

Introduction

Force

Acceleration and Newtons Second Law of Motion

Motion With Constant Acceleration

Circular Motion

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

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An 8000 kg satellite is launched from the surface of the earth,and injected into outer space a long distance from the earth.The initial velocity needed to launch the satellite into outer space is (G = 6.67 $\times$ 10^-11 Nm²/kg², Me = 5.98 $\times$ 10²⁴ kg, Re = 6.38 $\times$ 10⁶ m)