1. A force acting upon an object to cause a displacement is known as energy b. potential c. kinetic d. work a. 2. Two acceptable units for work are a. joule b. newton c. watt d. newton meter Choose two. Power as a Rate Quantity: 3. Power is defined as the a. amount of work which b. direction at which work C. angle at which work d. the rate at which work is done. 4. Two machines (e.g., elevators) might do identical jobs (e.g., lift 10 passengers three floors) and yet the machines might have different power outputs. Explain how this can be so.

1. A force acting upon an object to cause a displacement is known as energy b. potential c. kinetic d. work a. 2. Two acceptable units for work are a. joule b. newton c. watt d. newton meter Choose two. Power as a Rate Quantity: 3. Power is defined as the a. amount of work which b. direction at which work C. angle at which work d. the rate at which work is done. 4. Two machines (e.g., elevators) might do identical jobs (e.g., lift 10 passengers three floors) and yet the machines might have different power outputs. Explain how this can be so.