What kind of machine is this?

• wedge

• screw

• wheel and axle

• pulley

What kind of machine is this?

• wedge

• lever

• screw

• wheel and axle

What is the effort force?

• The weight of the car.

• The person pushing the car.

Tags

NGSS.HS-PS2-1

What is the effort force?

• The man pushing the tire.

• The weight of the tire.

Tags

NGSS.MS-PS2-1

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-PS2-1

NGSS.MS-PS2-2

This man is trying to roll the rock to the other side of his yard. Which sentence tells the best way to use a simple machine to get the rock moving again?

• He could carry the rock using his arms as a lever

• He could kick the rock using his body as a simple machine

• He put a small rock under the stick, and pull up on the stick

• He could put a small rock under the stick, and push down on the stick

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Look at the picture of these screws. Order the screws from easiest to turn to hardest to turn

• A, B, C

• C, B, A

• C, A, B

• B, C, A

Which best describes a pulley?

• A bar that turns on a fixed point

• A machine with lots of moving parts

• A wheel with a rope or chain around it

• A wheel and axle that are connected so they run together

Which best describes all simple machines?

• they have wheels

• they have many moving parts

• they have a bar that turns on a fixed point

• they only need one force applied to make work easier to do

Which simple machine is made up of an inclined plane that winds around a shaft?

• lever

• screw

• wedge

• wheel-and-axle