Simple and Complex Machines - Study Jams

What do simple machines do?

• decrease the amount of force necessary to do work

• decrease the distance an object must travel

• increase the number of people needed to do work

• increase the energy needed to move objects

What kind of simple machine is an average twist-top jar lid?

• a wedge

• a screw

• a ramp

• a pulley

When would a wedge be the most helpful?

• when lifting a piano to an upper story

• when moving a car across a distance

• when pulling a tree's roots from the ground

• when breaking up large rocks

Which machine needs a fulcrum, or a point where the machine is supported?

• a screw

• a wheel and axel

• a lever

• a wedge

Tags

NGSS.MS-PS2-1

A builder wants to put an elevator in her next building. Which simple machine should she use?

• a ramp

• a lever

• a pulley

• a wedge

Tags

NGSS.MS-ETS1-4

NGSS.MS-PS2-1

When would a wheel-and-axle be the most useful?

• when planting seeds in a greenhouse

• when trimming off tree branches

• when taking your desk downstairs

• when moving a heavy box to the next block

Tags

NGSS.MS-PS2-1

What kind of simple machine is a sliding board?

• a ramp

• a wheel and axle

• a screw

• a pulley