Question 1

Rolling a ball up an inclined plank requires an amount of work proportional to the

Accepted Answer

A) horizontal distance the ball is shifted. 
B) height the ball is raised. 
C) sum of the horizontal distance the ball is shifted and the height the ball is raised. 
D) length of the plank. 
A) horizontal distance the ball is shifted. 
B) height the ball is raised. 
C) sum of the horizontal distance the ball is shifted and the height the ball is raised. 
D) length of the plank.

Question 2

An 800-kg car moving at 80 km/h collides head-on with a 1200-kg car moving at 40 km/h in the opposite direction.If they stick together, the wreckage now has an initial speed of

Accepted Answer

A) 8 km/h. 
B) 40 km/h. 
C) 56 km/h. 
D) 60 km/h. 
A) 8 km/h. 
B) 40 km/h. 
C) 56 km/h. 
D) 60 km/h.

Question 3

To prevent it from tumbling in flight, a projectile such as a football is sent off spinning.The physical principle involved is

Accepted Answer

A) conservation of energy. 
B) conservation of linear momentum. 
C) conservation of angular momentum. 
D) the first law of motion. 
A) conservation of energy. 
B) conservation of linear momentum. 
C) conservation of angular momentum. 
D) the first law of motion.

Question 4

The work you do in raising an orange from your waist to your mouth is roughly

Accepted Answer

A) 1 J. 
B) 10 J. 
C) 100 J. 
D) 1,000 J. 
A) 1 J. 
B) 10 J. 
C) 100 J. 
D) 1,000 J.

Question 5

A horse has a power output of 1 hp (746 W) when it is pulling a cart.If the cart covers 100 m in 30 s, the force the horse exerts on the cart is

Accepted Answer

A) 0.22 kN. 
B) 0.34 kN. 
C) 0.45 kN. 
D) 2.49 kN. 
A) 0.22 kN. 
B) 0.34 kN. 
C) 0.45 kN. 
D) 2.49 kN.

Question 6

The mass equivalent of 6.0 MJ is

Accepted Answer

A) 6.7 * 10-11 kg. 
B) 5.4 * 10-9 kg. 
C) 6.7 * 10-3 kg. 
D) 2.0 * 10-2 kg. 
A) 6.7 * 10-11 kg. 
B) 5.4 * 10-9 kg. 
C) 6.7 * 10-3 kg. 
D) 2.0 * 10-2 kg.

Question 7

A sedentary person requires about 6 million J of energy per day.This rate of energy consumption is equivalent to about

Accepted Answer

A) 70 W. 
B) 335 W. 
C) 600 W. 
D) 250,000 W. 
A) 70 W. 
B) 335 W. 
C) 600 W. 
D) 250,000 W.

Question 8

The sun

Accepted Answer

A) attracts light waves passing nearby. 
B) repels light waves passing nearby. 
C) may attract or repel light waves passing nearby, depending upon the circumstances. 
D) has no effect on light waves passing nearby. 
A) attracts light waves passing nearby. 
B) repels light waves passing nearby. 
C) may attract or repel light waves passing nearby, depending upon the circumstances. 
D) has no effect on light waves passing nearby.

Question 9

On a molecular level heat is

Accepted Answer

A) kinetic energy. 
B) potential energy. 
C) mass energy. 
D) momentum. 
A) kinetic energy. 
B) potential energy. 
C) mass energy. 
D) momentum.

Question 10

When a skater pulls in her arms to turn faster, her angular momentum

Accepted Answer

A) increases. 
B) decreases. 
C) remains the same. 
D) Any of these choices, depending on circumstances. 
A) increases. 
B) decreases. 
C) remains the same. 
D) Any of these choices, depending on circumstances.

Question 11

The height above the ground of a child on a swing varies from 0.5 m at the lowest point to 2.0 m at the highest point.The maximum speed of the child is

Accepted Answer

A) about 5.4 m/s. 
B) about 7.7 m/s. 
C) about 29.4 m/s. 
D) dependent on the child's mass. 
A) about 5.4 m/s. 
B) about 7.7 m/s. 
C) about 29.4 m/s. 
D) dependent on the child's mass.

Question 12

A 40-kg boy climbs a vertical ladder at 0.5 m/s.His power output is

Accepted Answer

A) 5 W. 
B) 14 W. 
C) 20 W. 
D) 196 W. 
A) 5 W. 
B) 14 W. 
C) 20 W. 
D) 196 W.

Question 13

A 1-kg object is moving at 10 m/s.To double its kinetic energy, its speed should be increased to approximately

Accepted Answer

A) 14 m/s. 
B) 15 m/s. 
C) 20 m/s. 
D) 40 m/s. 
A) 14 m/s. 
B) 15 m/s. 
C) 20 m/s. 
D) 40 m/s.

Question 14

A rocket is fired in space.As it moves, the total momentum of the rocket and its exhaust gases

Accepted Answer

A) decreases. 
B) remains the same. 
C) increases. 
D) Any of the choices could be correct, depending on the nature of the rocket. 
A) decreases. 
B) remains the same. 
C) increases. 
D) Any of the choices could be correct, depending on the nature of the rocket.

Question 15

A horizontal force is applied to a 2-kg ball on a smooth table.The ball's speed is 8 m/s when it has gone 4 m.The magnitude of the force is

Accepted Answer

A) 1.6 N. 
B) 2 N. 
C) 8 N. 
D) 16 N. 
A) 1.6 N. 
B) 2 N. 
C) 8 N. 
D) 16 N.

Question 16

A weightlifter raises a 200-kg barbell through a height of 2 m in 2.2 s.The average power he develops during the lift is

Accepted Answer

A) 0.18 kW. 
B) 0.89 kW. 
C) 1.78 kW. 
D) 8.62 kW. 
A) 0.18 kW. 
B) 0.89 kW. 
C) 1.78 kW. 
D) 8.62 kW.

Question 17

The watt is a unit of

Accepted Answer

A) energy. 
B) work. 
C) momentum. 
D) power. 
A) energy. 
B) work. 
C) momentum. 
D) power.

Question 18

The 2.5-kg head of an ax exerts a force of 80 kN as it penetrates 18 mm into the truck of a tree.The speed of the ax head when it strikes the tree is

Accepted Answer

A) 1.2 m/s. 
B) 3.4 m/s. 
C) 34 m/s. 
D) 107 m/s. 
A) 1.2 m/s. 
B) 3.4 m/s. 
C) 34 m/s. 
D) 107 m/s.

Question 19

The minimum force that must be applied to a machine with a mechanical advantage of 5 in order to lift a 100-kg crate is

Accepted Answer

A) 20 N. 
B) 196 N. 
C) 500 N. 
D) 4900 N. 
A) 20 N. 
B) 196 N. 
C) 500 N. 
D) 4900 N.

Question 20

A total of 4900 J is expended in lifting a 50-kg mass.The mass is raised to a height of

Accepted Answer

A) 10 m. 
B) 98 m. 
C) 960 m. 
D) 245,000 m. 
A) 10 m. 
B) 98 m. 
C) 960 m. 
D) 245,000 m.

Rolling a ball up an inclined plank requires an amount of work proportional to the

An 800-kg car moving at 80 km/h collides head-on with a 1200-kg car moving at 40 km/h in the opposite direction.If they stick together, the wreckage now has an initial speed of

To prevent it from tumbling in flight, a projectile such as a football is sent off spinning.The physical principle involved is

The work you do in raising an orange from your waist to your mouth is roughly

A horse has a power output of 1 hp (746 W) when it is pulling a cart.If the cart covers 100 m in 30 s, the force the horse exerts on the cart is

The mass equivalent of 6.0 MJ is

A sedentary person requires about 6 million J of energy per day.This rate of energy consumption is equivalent to about

The sun

On a molecular level heat is

When a skater pulls in her arms to turn faster, her angular momentum

The height above the ground of a child on a swing varies from 0.5 m at the lowest point to 2.0 m at the highest point.The maximum speed of the child is

A 40-kg boy climbs a vertical ladder at 0.5 m/s.His power output is

A 1-kg object is moving at 10 m/s.To double its kinetic energy, its speed should be increased to approximately

A rocket is fired in space.As it moves, the total momentum of the rocket and its exhaust gases

A horizontal force is applied to a 2-kg ball on a smooth table.The ball's speed is 8 m/s when it has gone 4 m.The magnitude of the force is

A weightlifter raises a 200-kg barbell through a height of 2 m in 2.2 s.The average power he develops during the lift is

The watt is a unit of

The 2.5-kg head of an ax exerts a force of 80 kN as it penetrates 18 mm into the truck of a tree.The speed of the ax head when it strikes the tree is

The minimum force that must be applied to a machine with a mechanical advantage of 5 in order to lift a 100-kg crate is

A total of 4900 J is expended in lifting a 50-kg mass.The mass is raised to a height of

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Exam 3: Energy

Rolling a ball up an inclined plank requires an amount of work proportional to the

An 800-kg car moving at 80 km/h collides head-on with a 1200-kg car moving at 40 km/h in the opposite direction.If they stick together, the wreckage now has an initial speed of

To prevent it from tumbling in flight, a projectile such as a football is sent off spinning.The physical principle involved is

The work you do in raising an orange from your waist to your mouth is roughly

A horse has a power output of 1 hp (746 W) when it is pulling a cart.If the cart covers 100 m in 30 s, the force the horse exerts on the cart is

The mass equivalent of 6.0 MJ is

A sedentary person requires about 6 million J of energy per day.This rate of energy consumption is equivalent to about

The sun

On a molecular level heat is

When a skater pulls in her arms to turn faster, her angular momentum

The height above the ground of a child on a swing varies from 0.5 m at the lowest point to 2.0 m at the highest point.The maximum speed of the child is

A 40-kg boy climbs a vertical ladder at 0.5 m/s.His power output is

A 1-kg object is moving at 10 m/s.To double its kinetic energy, its speed should be increased to approximately

A rocket is fired in space.As it moves, the total momentum of the rocket and its exhaust gases

A horizontal force is applied to a 2-kg ball on a smooth table.The ball's speed is 8 m/s when it has gone 4 m.The magnitude of the force is

A weightlifter raises a 200-kg barbell through a height of 2 m in 2.2 s.The average power he develops during the lift is

The watt is a unit of

The 2.5-kg head of an ax exerts a force of 80 kN as it penetrates 18 mm into the truck of a tree.The speed of the ax head when it strikes the tree is

The minimum force that must be applied to a machine with a mechanical advantage of 5 in order to lift a 100-kg crate is

A total of 4900 J is expended in lifting a 50-kg mass.The mass is raised to a height of

The Scientific Method

Motion

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

The Universe

Filters