Simple Machines & Work

True or False: Work is done when a force is applied to an object. It doesn't matter if the object moves or not.

• True

• False

Match the following

• Broom

• Wheel & Axle

• Bicycle

• 3rd Class Lever

• Wheelbarrow

• 2nd Class Lever

• See Saw

• Wedge

• Knife

• 1st Class Lever

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

This lever has the fulcrum in the middle.

• 1st Class Lever

• 2nd Class Lever

• 3rd Class Lever

This lever has the resistance in the middle.

• 1st Class Lever

• 2nd Class Lever

• 3rd Class Lever

This lever has the effort force in the middle.

• 1st Class Lever

• 2nd Class Lever

• 3rd Class Lever

In a 1st class lever, if you push up on one end, the other goes...

• down

• up

• doesn't move.

• increases the force.

The longer the ramp, the ___ force you use.

• less

• greater

A bar that is free to pivot around a fixed point is a

• lever

• wedge

• screw

• pulley

This simple machine is used to cut objects.

• lever

• wedge

• screw

• pulley

This simple machine is an inclined plane wrapped around a wedge.

• lever

• wedge

• screw

• pulley

Tags

NGSS.MS-PS2-2