Work

Work

by SciDept Twenty Twenty-One

​Objectives

1. ​To differentiate between work in Physics and the dictionary definition of work

2. ​To calculate work given the applied force, angle, and displacement using a calculator with 100 percent accuracy

3. ​To identify the correct units of work.

Multiple Select

We can calculate the work done by using the formula

• Force × Energy

• Force × Distance

Multiple Select

Energy is the ability to do work.

• True

• False

Multiple Choice

Identify whether work is done or not in the picture

• Yes

• No

Multiple Choice

2) You hold a heavy piece of wood in one place.

• Work

• No Work

Multiple Choice

1.) You lift a box of newspapers.

• Work

• No Work

Multiple Choice

• True

• False

Multiple Choice

When the force is perpendicular to the motion, work is done.

• True

• False

Multiple Choice

Work is done when a person is studying or working on a desk like this woman in the picture.

• True

• False

Multiple Choice

Work is done on the ball after being hit by the tee.

• True

• False

Multiple Choice

Work is done on the lifted barbell.

• True

• False

Multiple Choice

Work is done on the released arrow.

• True

• False

Multiple Choice

Work is done on this dumbbell.

• True

• False

Multiple Choice

Work's unit is in Newtons.

• True

• False

Multiple Select

What is/are the unit/s of work?

• Newton

• dyn

• Newton meter

• Joule

Multiple Choice

How much erg is in one Joule?

• 1 x 108

• 1 x 107

• 1 x 106

• 1 x 105

Multiple Choice

An applied force of 150 Newtons moves the car half a meter. How much work is done on the car?

• 75 N

• 75 Joules

• 150 Nm

• 75 ergs

Multiple Choice

An applied force of 200 Newtons lifts her body 0.2 m. How much work is done on her?

• 40 N

• 40 ergs

• 0.001 Nm

• 40 Newton meter

Multiple Choice

A person pulls at a brick with a 25 degree angled force of 12 N. The brick moved 5 meters. How much work is done on the brick?

• 54.38 Joules

• 5.437 Nm

• 25.35 Joules

• 54.37 ergs

Multiple Choice

A person pulls at a box with a 40.2 degree angled force of 7.1 N. The brick moved 2 meters. How much work is done on the brick?

• 570.84 Joules

• 10.85 Nm

• 14.2 Joules

• 0.35 ergs