Quiz: Forces and Motion

The term inertia refers to...

• the tendency of objects to resist changes in motion

• the tendency of objects to acceleration when they are in a gravitational field

• the tendency of object to return to rest when there is no net force

• the resistance to motion objects experience due to friction

Consider an object being pushed along a surface. If the force of gravity were to decrease, the force of friction would...

• Increase

• Decrease

• Stay the same

A student stands on a skateboard, throws a bowling ball forward, and accelerates backward on the skateboard. This is an instance of Newton's _________ law.

• First

• Second

• Third

• Forth

A (fictitious) young boy who doesn't care for his sister's cat, captures the cat and secures it in a wooden box. The boy then takes the cat-in-the-box up to the roof and drops it. The force the cat feels is:

• The top of the box pushing it down

• Gravity

• The normal force from the bottom of the box

• Hatred

In a game of Tug of War, the red team uses 600N of force to the left, and the blue team uses 200N of force to the right. Which statement below describes the game?

• Forces are balanced and there is no motion

• The net force is 800N and the blue team wins

• The net force is 400N to the right and the red team wins

• The net force is 400N to the left

A soccer ball rolling down a field changes direction. While the soccer ball is changing direction, which statement is true?

• The soccer ball must have more than one force acting on it

• The net force on the soccer ball is not zero

• The net force on the soccer ball is zero

• The direction is it moving must not change.

Gravity is an example of a ____________ force.

• contact

• non-contact

• strong

• constant

Standing on ice you push a friend named Pete. The force moving you backward comes from...

• the ice

• Pete

• Yourself

• There is no force pushing you backward

If there are two forces going in the OPPOSITE direction, you would ...?

• (-) Subtract the forces

• (+) Add the forces

• Neither

• (x) Multiply

What is the net force?

• 100 N to the left

• 400 N to the right

• 700 N total