Force and Motion Review

If you are pushing a wagon and one wheel falls off...what best explains why it is now harder to push the wagon?

• The wheel is no longer transferring force to the axle, increasing the amount of force needed.

• The wheel is no longer using force, making it easier to push.

• The wheel is no longer transferring force to the axel, decreasing the amount of force needed.

• The wheel is no longer increasing the force to the axel making it harder to push.

Tags

NGSS.MS-PS2-2

What force causes a ball to fall to the ground?

• Big force

• Gravitational force

• Sir Issac Newton

• Balanced force

Tags

NGSS.MS-PS2-4

What kind of simple machine is a bottle opener?

• Pulley

• Lever

• Wheel and Axle

• wedge

What kind of simple machine is a skateboard ramp?

• wedge

• lever

• pulley

• inclined plane

An axe is a __________.

• inclined plane

• pulley

• wheel and axel

• wedge

What kind of simple machine is a jar lid?

• inclined plane

• screw

• wedge

• pulley

What type of simple machine is a bicycle wheel?

• wedge

• screw

• wheel and axel

• pulley

A pulley changes the force to a______________ ​ force.​

• upward
• heavy
• increased
• big

How do simple machines effect work?

• They make work harder.

• They change the direction or amount of force needed.

• They do all the work and remove the need for any force.

• They increase the amount of force needed.

Reducing friction makes a machine...................

• More efficient (work better)

• Less efficient (work harder)

• Break

• Stop working.