Ch. 14.2 - Work and Machines

Ch. 14.2

Work and Machines

Open Ended

Describe what a machine is able to do.

Multiple Choice

True or False? A machine can make word easier to do by changing the size of the force needed, the direction of a force, or the distance over which a force acts.

• True

• False

Fill in the Blanks

If a machine increases the distance over which a force is exerted, the force required to do a given amount of work

.

Fill in the Blanks

The work done by a machine is always less than the work done on a machine because of

.

Multiple Choice

Select the definition for input force.

• The amount of force exerted by a machine

• The amount of friction slowing the speed of a machine

• The amount of work done by a machine

• The amount of force exerted on a machine

Multiple Choice

True or False? Every machine uses some of its work input to overcome friction.

• True

• False

Fill in the Blanks

The force exerted by a machine is called the

force.

Multiple Choice

True or False? Output work is always less than input work.

• True

• False