Forces, Friction, & Laws of Motion Review

Which 2 characteristics describe force?

• Strength & Mass

• Mass & Motion

• Motion & Strength

• Direction & Strength

Which is NOT TRUE about acceleration?

• It is caused by an unbalanced force.

• The SI units are m/s^2.

• It occurs if a force can overcome the mass.

• It can only speed up.

Two forces are cancelled out when....

• have a low acceleration.

• they are balanced.

• have a high acceleration.

• they are unbalanced.

Which is not a factor that effects the strength of friction?

• Attraction between charged particles.

• How hard they press together.

• Direction of the force.

• Surface Type

Which type of friction is easiest to overcome?

• Rolling

• Sliding

• Static

• Fluid

What is an example of fluid friction?

• Honey when it is spread over bread.

• Wheels on a scooter.

• Hand brake on a bike.

• Pillow on the couch.

When a soccer ball is kicked across a field , it is an example of...

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Momentum

In a car crash, whiplash is an example of...

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Momentum

Jumping on a trampoline is an example of...

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Momentum

When a bat hits a baseball, what is the reaction force?

• bat ---> ball

• ball ---> bat

• air ---> ball

• ball ---> air