Physics Quiz

Friction acts in a direction ____________ to the direction of an object's motion. Choose the best answer.

• Unrelated

• Opposite

• Equal

• Perpendicular

How much force is needed to accelerate a 10-kg ball to 500 meters per second squared? Force = Mass x Acceleration

• 5,000 N

• 50 N

• 150 N

• 1/50 N

A(n) ___________ can cause an object's motion to change. Choose the best answer.

• Unbalanced force

• Balanced force

• Weight

• Inertia

The amount of matter in an object is called its __________. Choose the best answer.

• Weight

• Force

• Inertia

• Mass

Explain the difference between balanced and unbalanced forces.

Describe Newton’s first law of motion in as much detail as you can.

Match the following

• Inertia

• The kind of friction that results when a wheel turns on a surface.

• Rolling friction

• Tendency to resist a change in motion

• Force

• The general term for the force that one surface exerts on another when they rub against each other.

• Friction

• A push or a pull

Match the following

• Attracts objects towards the Earth

• Sliding friction

• friction that slows down falling object

• Gravity

• 1. friction from two objects

• Air resistance