Work and Simple Machines

A simple machine that consists a rigid bar that pivot about a fixed point

• lever

• pulley

• wheel and axle

• fulcrum 

An axe is an example of a

• pulley

• inclined plane

• screw

• wedge 

A seesaw is an example of a  

• wedge

• lever 

• inclined plane 

• pulley 

A device that has two or more simple machines working together 

• fulcrum 

• pulley

• compound (complex) machine 

• motor 

Stairs

• wedge

• pulley

• inclined plane

• wheel and axle

Tags

NGSS.MS-PS2-1

Which is not a type of simple machine?

• spring

• screw

• pulley

• wedge

The fixed point on the lever is called 

• load

• resistance

• bar

• fulcrum

The device used to raise a flag up a flag pole is an example of a 

• wheel and axle 

• lever

• inclined plane 

• pulley 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is effort (input) force?

• the force required by a machine in order to accomplish work (the force you put on the machine)

• the force which an effort force must overcome in order to do work on an object via a simple machine.

• the force the machine exerts on a object

• the output work times the input distance

What is this an example of?

• pulley

• lever

• inclined plane

• wheel and axle

Tags

NGSS.MS-PS2-2