Physical Science Review

Why is it harder for the boy in Image B to get down the hill?

• Motion
• Friction
• Work
• Displacement

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

In the image, which of the person and their bikes will get down a hill faster? 

• The boy because he is younger
• The woman because she is stronger
• The boy because he has a greater mass which applies a greater force
• The woman because she has more mass and applies a greater force

Scissors are made of what two simple machines? 

• lever and wedge
• wheel and axle and lever
• screw and pulley
• wedge and screw

Bob says he likes simple machines because he doesn't have to do the work. Susan says simple machines make work easier, but you still have to do the work. Who is correct?

• Bob
• Susan

It is getting cold outside and Dad says we need to split some logs into smaller pieces for the fireplace. What simple machine will allow Dad to split the logs into smaller pieces?

• lever
• wheel and axle
• wedge
• screw

A bottle opener is an example of a ...

• lever
• wedge
• pulley
• inclined plane

When an object has a GREATER FORCE applied to it, what will be the result?

• the object will slow down and stop
• the object will speed up and change direction
• the object will turn
• the object will stop and turn around

Identify this simple machine

• Lever
• Wheel & Axle
• Inclined Plane
• Screw

Which of the following does a simple machine do?

• allows the users to apply less force over a longer distance
• reduce the amount of force needed to do work
• change the direction of the applied force
• all of the above