Terminal Velocity Weightlessness Free Fall Air Resistance

When a falling object stops accelerating and falls at a constant speed, it is

• fluency

• constant velocity

• acceleration

• terminal velocity

An object is falling downward through Earth's atmosphere. In which direction is the air resistance force?

• Down

• Up

• Around the object

• Through the object

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The upward force which is exerted against a falling object is

• gravity

• terminal velocity

• air resistance

• intertia

Complete the sentence.

It is not the difference in gravity that causes objects to fall at different speeds, it’s the difference in the amount of__________________.

• Gravity

• Mass

• Air resistance

Tags

NGSS.MS-PS2-4

If you jump out of an airplane, which two forces are acting on you?

• Gravity and friction

• Force and gravity

• Gravity and Air Resistance

When you drop a hammer and a feather on the moon what will happen? There is no air on the moon.

• They will hit at the same time

• The hammer will hit first

• The feather will hit first

Tags

NGSS.MS-PS2-4

________ acts to slow the rate at which objects fall.

• Thrust

• Barometer

• Air Resistance

• Gravity

What is a parachute designed to maximize?

• Gravity

• Air Pressure

• Air Resistance

• Thrust

A girl drops a 7 gram bowling ball and a 1gram rock from a cliff. Which will hit the ground first?

• Bowling Ball

• Rock

• Ignoring air resistance, both will hit at the same time.

• The cliff

Tags

NGSS.MS-PS2-4

What does it mean for an object to be in free fall?

• Only air resistance acting on the object.

• Gravity is the only force acting on the obejct.

• Any object that is in downward motion.

Tags

NGSS.MS-PS2-4