Chapter 2 Review (Forces)

Friction acts in a direction ________________ to the direction of an object's motion.

• Unrelated

• Equal

• Perpendicular

• Opposite

An object will stay at rest unless acted upon by an outside force due to its ___________.

• Matter

• Friction

• Inertia

• Gravity

A 20-kg ball is accelerated 500 m/s² by a force of ____________.

• 10,000 N

• 1000 N

• 100 N

• 25 N

The momentum of a 100 kg football player traveling at a velocity of 5 m/s is...

• 25 kg*m/s

• 500 kg*m/s

• 50 kg*m/s

• 5000 kg*m/s

A(n) ______________ causes no change in an object's motion.

• balanced force

• unbalanced force

• air resistance

• inertia

Mass is the amount of _____________ in an object.

• weight

• matter

• liquid

• water

Newton's 2nd Law of Motion states the relationship of mass, acceleration, and force. It says that...

• force equals mass divided by acceleration

• force eqials acceleration divided by mass

• acceleration equals force divided by mass

• every object attracts every other object in the universe

A(n) ___________ causes objects to move in a circle.

• centripetal force

• large weight

• terminal velocity

• acceleration

A newton is equal to __________.

• the amount of mass in an object

• mass x velocity

• kg*m/s²

• kg*m/s

An object in free fall ____________ until it reaches terminal velocity.

• decreases in mass

• decelerates

• accelerates

• is unbalanced