Unit 1 Test Review: Forces, Motion and Energy

A force is

• the application of weight

• a push or pull on an object

• equal to the mass of an object

• the flow of electricity

Which is an example of potential energy?

• A person riding a bike down a hill

• A bowling ball rolling down the lane

• Water stored behind a dam

• Light traveling from the sun to Earth

A 200N child is listed 2 meters. How much work is done? w=f x d

• 100J

• 200J

• 400J

• 800J

What is the energy chain for a flashlight?

• Chemical --> Electrical --> Radiant

• Chemical --> Electrical --> Mechanical

• Chemical --> Electrical -->Thermal

• Chemical --> Radiant --> Mechanical

The ability to do work or cause a change

• Acceleration

• Energy

• Force

• Gravity

What is the power of an elevator that did 4000J of work in 20 seconds? p=w/t

• 80,000 W

• 200 W

• 0.005 W

• 2000 W

When a car is burning fuel (gas), it converts _____ energy into mechanical energy

• Radiant

• Chemical

• Electrical

• Thermal

Mrs. Bromberg tries to push a school bus out of the way. She applies a force of 10,000N for 20 seconds. The bus does not move. How much work did she do? w=f x d

• 10,000 J

• 500 J

• 200,000 J

• No work was done

The rate of doing work

• Speed

• Power

• Force

• Acceleration

The law of conservation of energy says (check 3 correct) answers

• Energy cannot be created

• Energy can be created

• Energy cannot be destroyed

• The total amount of energy increases

• The total amount of energy remains the same