Work, Energy & Simple Machines Pretest

This simple machine is made up of a bar that pivots on a fixed support, or fulcrum.

• pulley

• lever

• wedge

When you apply a force to the wheel of a bicycle the axle will turn ______________ than the wheel.

• faster

• slower

• the same

A ____________ is a rope (pulled over a wheel) that makes work easier by changing the direction of force or increasing the applied force.

• lever

• wedge

• pulley

Which machine would be best to use If you want to lift a very heavy object straight up?

• inclined plane

• screw

• wedge

A knife is an example of a__________________.

• wedge

• screw

• inclined plane

Decide if the pictures below illustrate work or no work.

Drag and drop if the pictures are showing work or no work.

• no work

• 
• work

• 
• no work

• 
• work

• 
• work

• 

Which of the following is the type of energy that moves an object?

• mechanical

• light

• thermal

A barking dog that you can hear from across the street is an example of ______ energy?

• wave

• sound

• mechanical

As your oven heats up your dinner, it is using ______ energy to cook your food.

• sound

• thermal

• mechanical

You plug your phone into the wall to charge it. Which type of energy runs through the cord and makes the phone charge?

• electrical

• sound

• mechanical