Work & Simple Machines

Work & Simple Machines

Use these notes to fill in the missing information on your fill-in-the-blank sheets.

Multiple Choice

WORK only occurs when the force being applied and the motion of the object are moving in the ______ direction.

• same

• opposite

Multiple Choice

To calculate WORK, you need to know two things:

(1) the force being applied and (2) _____

• the acceleration of the object

• the distance the object moved

• the time it took to move the object

Multiple Choice

Calculating POWER (P = W/t) may be a multi-step problem. You may first need to calculate FORCE, which will then allow you to calculate WORK. So, how do you calculate FORCE? (We did this last week.)

• s = d/t

• F = ma

• P = W/t

Multiple Choice

TRUE or FALSE: The INPUT force is the force YOU apply to the machine. The OUTPUT force is the force that the machine applies to the task.

• True

• False

Multiple Choice

When you put a small amount of force into a task and a machine increases the strength of your force, what has occurred?

• Acceleration

• Power

• Mechanical Advantage

• Nothing