Quiz about Conservation of Energy Mechanical Energy

Question 1

A ball is projected into the air. Where is potential energy the greatest?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Question 2

As a roller coaster goes downhill

Accepted Answer

potential energy is converted into kinetic energy.

Answer

kinetic energy is converted into potential energy.

Answer

electrical energy is converted into potential energy.

Answer

potential energy is converted into electrical energy.

Question 3

A pole vaulter runs forward, plants his pole, rises in the air and lands. Which transfer of energy best represent this motion?

Accepted Answer

kinetic --> elastic --> gravitational potential

Answer

gravitational potential --> elastic --> kinetic

Answer

kinetic --> gravitational potential --> elastic

Answer

elastic --> gravitational potential --> kinetic

Question 4

Energy transformations occur when...

Accepted Answer

energy changes from one form to another

Answer

energy is created through conduction

Answer

two forces slide together that are touching

Answer

a chemical reaction takes place

Question 5

The skater starts 8 meters above the ground. At which height on the ramp does the skater's total energy change ?

Accepted Answer

The skater's total energy doesn't change.

Answer

8 meters

Answer

4 meters

Answer

2 meters

Question 6

Is energy always conserved?

Accepted Answer

Always

Answer

Often

Answer

Never

Answer

Sometimes

Question 7

As Elijah drops a ball from a height, its __________ energy decreases and its kinetic energy increases

Accepted Answer

potential

Answer

chemical

Answer

thermal

Answer

electric

Question 8

During a science class, Abigail and Samuel are discussing the law of conservation of energy. They wonder if the total amount of energy in the universe ____.

Accepted Answer

remains constant

Answer

changes constantly

Answer

increases

Answer

decreases

Question 9

Ethan and Harper are on a roller coaster ride. At which point(s) on the roller coaster is the gravitational potential energy at its maximum?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 10

Avery and Emma are on a roller coaster ride. At which point(s) on the roller coaster is the kinetic energy at its maximum?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 11

Which of the following best describes the principle of conservation of mechanical energy?

Accepted Answer

The total mechanical energy in a closed system remains constant if only conservative forces are acting.

Answer

Energy can be created or destroyed, but not transformed.

Answer

Mechanical energy is always converted into thermal energy.

Answer

Mechanical energy is only conserved in the presence of non-conservative forces.

Question 12

A pendulum is released from a certain height. At the lowest point of its swing, its speed is maximum. What happens to the potential and kinetic energy of the pendulum as it swings from the highest to the lowest point?

Accepted Answer

Potential energy decreases, kinetic energy increases.

Answer

Potential energy increases, kinetic energy decreases.

Answer

Both potential and kinetic energy remain constant.

Answer

Potential energy and kinetic energy both increase.

Question 13

In a frictionless roller coaster, a car starts from rest at the top of a hill. Which of the following statements is true about the car's energy as it descends the hill?

Accepted Answer

The car's potential energy is converted into kinetic energy.

Answer

The car's kinetic energy is converted into potential energy.

Answer

The car's mechanical energy is lost as heat.

Answer

The car's total energy increases.

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