Unit 1 Test Review: Work & Machines

In order to do work on an object, a _________ is applied to move it a certain distance.

• mass

• force

• property

Which of the following is a scientific example of doing work?

• Lifting a baby

• Standing in line

• Holding a tray

• Laying on the couch

Mindy lifts a 30-N box up 2 meters onto a shelf. How much work did she do?

• 15 J

• 60 J

• 15 watts

Humans use devices called _________ to make work faster or easier.

• siblings

• cheat codes

• machines

What is the name of the force that a person applies to a simple machine?

• Input Force

• Output Force

Simple machines (like an inclined plane) help make work easier by ___________ the distance over which a force is applied.

• increasing

• decreasing

• eliminating

Which type of simple machines make up an axe?

• Pulley and wedge

• Wheel & Axle and Lever

• Lever and wedge

Where would an object have the least amount of potential energy?

• Laying on the floor

• Sitting on top of a refrigerator

• Sitting on top of a roof

If mechanical energy is __________, that means it is not gained or lost.

• spent

• conserved

• measured

If a book falls from a table, where does it have the most kinetic energy?

• At rest on the table

• Just after it falls

• Right before it hits the ground

• After it hits the ground