Simple Machines

What is work?

• A pull or a push

• Applying a pull or a push to move or change something

• The rate at which a force is applied to an object

• The rate at which energy is used to apply a force to an object

Work is measured in:

• Meter

• Newtons

• Joules

• Seconds

1.        Complete the statement. _________ is the ability to do work.

• Energy

• Power

• Force

• Push or Pull

How much energy does a person use in order to perform 100 Joules of work?

• 50 Joules of energy

• 100 Joules of energy

• 200 Joules of energy

• A person doesn’t use energy to perform work

What is power?

• The rate at which energy is used or work is performed

• The total amount of energy a person uses to perform work

• The total amount of force a person applies to move an object

• A way to describe the strength of a force

What is a simple machine?

• A tool that reduces the amount of work performed

• A tool that increases the amount of work performed

• A tool that makes it easier to perform work

• Both a and b

Which simple machine can help you raise an object?

• An inclined plane

     

• A pulley

• A lever

• All of the above

Complete the statement. As the angle of the inclined plane decreases...

• The force required to raise the object decreases and the force must be applied over a greater distance

• The force required to raise the object decreases and the force must be applied over a smaller distance

• The force required to raise the object increases and the force must be applied over a greater distance

• The force required to raise the object increases and the force must be applied over a smaller distance

Which simple machine converts a downward force into a horizontal force, which is useful in splitting an object into two parts?

• An Inclined Plane

• A Wedge

• A Screw

• A Puller

Which simple machine helps connect objects together?

• A wedge

• A screw

• A lever

• A pulley