Free Fall Concepts and Problems

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

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

If you drop an object from rest, the speed of the object will ___ as it falls.

• increase

• decrease

• remain constant

Tags

NGSS.HS-PS2-1

NGSS.HS-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.HS-PS2-1

NGSS.HS-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.HS-PS2-1

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.HS-PS2-1

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.HS-PS2-1

Study the diagram. You throw a stone upward at 60 m/s on both planets. The stone on Earth reaches its highest point __ seconds before the stone on Planet Cheese.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4