Simple Machines 4th Grade

What is a simple machine?

• a device that changes a force

• a device that lets us use less force to move an object

• a device that increases the distance over which a force is applied

• all of these answers are correct

What is a push or pull acting on an object?

• force

• gravity

• mass

A ball on a perfectly flat ground _______________

• will start bouncing

• will roll away

• will not move unless a force acts on it

For every motion, there is a __________

• mass

• force

• reaction

Which of these is an example of a simple machine?

• wheel and axle

• all of these options are correct

• pulley

• lever

Some simple machines change the direction of a force

• true

• false

A ramp is an example of a(n) ____________

• inclined plane

• force

• level

• wedge

What simple machine makes work easier by using a wheel and rope to help move an object?

• lever

• pulley

• wedge

• wheel and axle

Which of the following is not an example of wheel and axle?

• 
• 
• 
• 

What is this simple machine?

• gear

• pulley

• lever

• wedge