Energy and Work

1. What is the equation for calculating the potential energy of an object?
PE = 1/2 mv2
PE = mgh
PE = ma

2. The Law of Conservation of Energy states that energy:
can never be created or destroyed
exists only as potential and never as actual
energy is required for life to exist

3. The SI unit of energy is:
newton
wavelength
joule

4. A bar that is free to pivot about a fixed point (fulcrum) is called a:
inclined plane
lever
wedge

5. What part of the lever is the input force?lever
Part A
Part B
Part C

6. What type of lever is pictured?
1st Class
2nd Class
3rd Class

7. Work is defined as a transfer of _______________ when a force makes an object move.
effort
energy
input

8. What is the equation used to calculate work?
W = F x d
W = m x a / 2
W = md/t

9. A wheelchair ramp is a form of:
wedge
pulley
inclined plane

10. Fixed pulleys:
require no work
cannot move
have two wheels

Score =
Correct answers: