Gravity, Freefall, Projectiles & falling objects

Two factors affecting the strength of gravity between 2 objects are...

• weight and mass

• distance and weight

• mass and matter

• mass and distance

Tags

NGSS.MS-PS2-4

A ball is dropped from the roof of a tall building it reaches the ground in 3 seconds. What is its velocity upon impact?

• 9.8 m/s

• 19.6 m/s

• 29.4 m/s

• 30 m/s

Tags

NGSS.HS-PS2-1

Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?

• the feather

• the metal bolt

• They would hit the ground at the same time.

• They would be suspended in a vacuum.

Tags

NGSS.HS-PS2-4

If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by

• its rate depends on its initial speed

• 15 m/s

• 9.8 m/s

• 5 m/s

Tags

NGSS.HS-PS2-1

The more mass an object has, the faster it will fall.

• True
• False

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first? 

• Neither- they hit at the same time
• the horizontally thrown ball
• the dropped ball
• None of these

Tags

NGSS.MS-PS2-2

Without air resistance, objects of different masses fall at the same rate because

• the objects receive equal gravitational pull

• the heavier object receives more gravitational pull than the lighter object

• the lighter object receives more gravitational pull than the heavier object

• this is a trick question...objects of different masses do not fall at the same rate

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

If an object is accelerating,

• there is an equal amount of gravity and air resistance

• there is more air resistance than gravity

• there is less gravity than air resistance

• there is more gravity than air resistance

Tags

NGSS.MS-PS2-2

If an object is NOT accelerating,

• gravity and air resistance are equal

• they have reached terminal velocity

• they are falling at a constant velocity

• all of the answers are true

Tags

NGSS.HS-PS2-1