Machines (Simple and Compound)

Cassie lives at the top of a hill. Which simple machine is the road to her house most like?

• Inclined plane

• Screw

• Wedge

• Pulley

Which object in the picture is an inclined plane?

• The ladder

• The seesaw

• The swing

• The slide

This girl is measuring the force needed to pull the truck up the ramp.

Which is a way to decrease the amount of force needed to pull the truck up the ramp?

• shorten the length of ramp

• add another book to the pile

• increase the length of the ramp

• put something heavy in the back of the truck

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Why does a long ramp require less force than a short ramp to move a car?

• because all inclined planes make work easier

• because the work is spread out over a longer distance

• because the long ramp is smoother than the short ramp

• because a car moves up a long ramp faster than it moves up a short ramp

Tags

NGSS.MS-PS2-4

Mrs. Iniguez’s class set up an experiment to measure how an inclined plane helps make work easier. The class will fill in this table to show their results.

What is the best prediction of the class’s conclusions?

• To move a heavy object, use a lever.

• To move a heavy object, do not use a ramp.

• To move a heavy object up a ramp, use a long ramp.

• To move a heavy object up a ramp, use a short ramp.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Isaac built a 15-cm ramp. He used a spring scale to measure the force needed to pull a car up the ramp. He then built a 25-cm ramp and repeated the experiment using the longer ramp. What will the results of his experiments most likely be?

• It will take no force to pull the car up the 25-cm ramp.

• It will take less force to pull the car up the 25-cm ramp.

• It will take more force to pull the car up a 25-cm ramp.

• It will take the same amount of force to pull the car up both ramps.

Tags

NGSS.MS-PS2-2

In this picture, a woman is pushing a box up a ramp.

What could she do to lessen the amount of force she needs to apply?

• use a larger truck

• use a shorter ramp

• use a wheel-and-axle

• use a ramp that is less steep

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

A hand-operated can opener is made up of two levers, a wedge, and a wheel-and-axle. Which best describes the can opener?

• a force

• a screw

• a compound machine

• a simple machine

Miguel uses a wheelchair. Which simple machine does Miguel most likely use to get past the three steps at the front entrance of his school?

• inclined plane

• lever

• screw

• wedge

Which simple machine could be used to hold two objects together?

• Inclined plane

• Screw

• Pulley

• Wedge