Force and Simple Machines

Force and Simple Machines

​Simple Machines

​There are 6 simple machines:

​

​1. lever

​2. screws

​3. inclined planes

​4. pulley

​5. wedge

​6. wheel and axel

​

Multiple Choice

Gravity attracts all objects towards one another. 

• True
• False 

Multiple Choice

All simple machines help make work _________.

• harder
• smaller
• lighter
• easier

Multiple Choice

An example of a gravitational interaction is that the Earth... 

• orbits the sun
• orbits the moon
• orbits other planets 
• None of the above 

Multiple Choice

Which type of simple machine is a playground slide? 

• Wedge
• Pulley
• Inclined plane
• Lever

Multiple Choice

Which is not a type of simple machine?

• spring
• screw
• pulley
• wedge

Multiple Choice

A force is ____.

• a push or pull that can cause movement

• a magnet

• when someone does not work

Multiple Choice

The forces are ___

• balanced

• unbalanced

Multiple Choice

The forces balance each other.

• true

• false

Multiple Choice

Are forces balanced or unbalanced when a plane is moving at a constant speed in a straight line?

• Balanced
• Unbalanced

Multiple Choice

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed

Multiple Choice

The rougher the surface, the faster an object will travel over the surface.

• True
• False

Multiple Choice

Which would create more friction?

• carpet

• metal

Multiple Choice

I am a rope and wheel system that lifts and lowers a load. EX: flagpole, blinds, elevator. What am I?

• lever

• pulley

• wedge

• inclined plane 

Multiple Choice

I am made of two incline planes placed back to back; you push me into an object and I change the direction of the force so that it pushes the object sideways in two directions Ex: knife or axe. What am I?

• wedge

• pulley

• inclined plane

• screw

Multiple Choice

I am an inclined plane wrapped around a pole. When you turn me, the work is spread over the whole distance of an inclined plane. I can hold things together or lift objects . What am I?

• screw

• pulley

• wedge

• lever