Physical Science- Unit 5- Energy

What is the correct definition of energy?

• the ability to do work

• force × distance

• chemical change

• force

Which type of energy is stored in chemical compounds and released in chemical reactions?

• electrical energy

• potential energy

• kinetic energy

• chemical energy

Which type of energy is the energy of motion?

• stored

• static

• potential

• kinetic

What does a ball falling through the air have?

• both potential energy because it still has a distance to move before it hits the ground and kinetic energy because it is moving

• both kinetic energy because it still has a distance to move before it hits the ground and potential energy because it is moving

• only potential energy

• only kinetic energy

When a car stops, the brakes heat up because of friction. What is this an example of?

• elastic motion

• periodic motion

• one form of energy being converted to another

• energy being destroyed

Which type of energy is stored energy?

• potential

• kinetic

• chemical

• mechanical

Which type of energy is water held back by a dam?

• potential energy

• kinetic energy

• chemical energy

• mechanical energy

Which type of energy does a swinging pendulum demonstrate?

• chemical energy

• only potential energy

• only kinetic energy

• both potential and kinetic energy

How can the period of a pendulum be increased?

• by adding mass

• by taking away mass

• by making the string longer

• by making the string shorter

What happens to the force needed to stretch an elastic object?

• It remains the same as it is stretched.

• It increases to stretch it farther.

• It decreases to stretch it farther.