2.3 Free Fall Motion

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. How many seconds does it take to get to the top of its arc?

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS2-1

Using g = -10 m/s²:

A ball is tossed up from the ground at a speed of 40 m/s. What will its velocity be after 3 seconds?

• 30 m/s

• 10 m/s

• 0 m/s

• -20 m/s

• -50 m/s

Tags

NGSS.HS-PS2-1

nik nazim is standing on the top observation deck of the Eiffel Tower in Paris at a height of 300 meters. He drops his cell phone. How fast will the phone be traveling when it hits the ground? Ignore the effect of air resistance.

• 9.8 m/s

• 76.68 m/s

• 149.76 m/s

• 46.99 m/s

Tags

NGSS.HS-PS2-1

Heavier objects free fall faster than lighter objects.

• True

• False

Tags

NGSS.MS-PS2-4

What happens to the velocity of a ball as it is dropped off a cliff? 

• It decreases at a uniform rate 
• It increases at a uniform rate 
• It is constant 
• It increases at a non-uniform rate

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Which of the following graphs best represents free fall motion?

• 
• 
• 
• 

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Consider a heavy and a light person jumping together with same-size parachutes from the same altitude. Who will reach the ground first? (in NON-freefall)

• Light person

• Heavy person

• Both will reach at the same time.

Tags

NGSS.HS-PS2-1

A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be 

• less than the speed it had when thrown upwards.
• more than the speed it had when thrown upwards.
• the same as the speed it had when thrown upwards.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-5

A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about:

• 6m/s
• 30m/s
• 60m/s
• 300m/s

Tags

NGSS.MS-PS2-2

A baseball is thrown up into the air. What happens to the velocity as the ball rises in the air?

• the velocity increases

• the velocity decreases

• the velocity remains constant

Tags

NGSS.HS-PS2-1