Free Fall Problems

Which of these dot diagrams represents a free falling object dropped from rest?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Planet X has an acceleration due to gravity of 8 m/s/s. If you throw a rock upward at 40 m/s, it's velocity will ​be ​ (a)   when it reaches the highest point in ​ (b)   .

• 0 m/s
• 5 seconds
• 8 seconds
• 4 seconds
• 20 m/s
• 40 m/s

Tags

NGSS.MS-PS2-4

On Planet X gravity is 8 m/s/s. You throw a rock upward at 40 m/s. What is its velocity 4 seconds later?

• 8 m/s, rising

• 8 m/s, falling

• 5 m/s, rising

• 5 m/s, falling

• 0 m/s, at highest point

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-5

On Planet X gravity is 8 m/s/s. You throw a rock upward at 40 m/s. How long after throwing it will it have a velocity of -8 m/s?

• 3 s

• 4 s

• 5 s

• 6 s

• 8 s

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-5

You live on Planet Doofenshmurtz where gravity is 4 m/s/s. You throw a stone straight upward. Exactly 10 seconds later, you catch it at the same place when it comes down. At what speed did you throw the stone?

• 4 m/s

• 12 m/s

• 8 m/s

• 10 m/s

• 20 m/s

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

If an object is in free fall for three seconds, how fast will it be falling at the end of its motion?

vf= gt

• 9.8 m/s

• 19.6 m/s

• 29.4 m/s

• 39.2 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A pumpkin is dropped from a 35 m building. What is its initial velocity (v_i)?

• 9.8 m/s²
• 35 m
• 0 m/s
• 9.8 m/s

• 0.09 s

• 0.03 s

• 0.3 s

• 0.9 s

Tags

NGSS.MS-PS2-4

Juan 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.MS-PS2-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Approximately how far can an object fall in 5 seconds?

• 5 m

• 25 m

• 50 m

• 125 m