1. Sci. 4-1
Work and Power
Pages 88-91

2. A. Work- occurs when a force causes an object to move in the direction of the force. The SI unit for work is joule (J).

3. B. Applying force doesn’t always result in work being done.

4. C. Work is done on an object only when the force makes the object move.

5. D. For work to be done, the direction of the object’s motion must be in the same direction as the force is applied.

6. Work Formula
Work equals Force times distance
W = F x d

7. SI Units
Force = (N) newtons
Work = (J) joules
distance = (m) meters

8. G. Power- is the rate at which work is done
Power Formula
Power = work / time
P = W t

9. Joules per second is the same as a watt (W).
J. The SI unit for power is a watt (W).