Gravity and Free Fall

Do free falling objects move at constant velocity or do they accelerate?

• Falling objects accelerate at -9.8 m/s²

• Falling object move at constant velocity

• Falling objects accelerate at 100 m/s²

• It depends on the mass: heavy objects accelerate, light objects do not

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What values are always known for a free falling object?

• v_i = 0 m/s
   a = -9.8 m/s²

• v_i = -9.8 m/s
   a = -9.8 m/s²

• v_i = -9.8 m/s
   a = 0 m/s²

• d = -9.8 m
  v_i = 0 m/s

Tags

NGSS.MS-PS2-4

Which of the following graphs best represents free fall motion?

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Tags

NGSS.MS-PS2-4

A man drops his camera off of the top of the oil derrick tower at Six Flags. Which of the following kinematic equations would he use in order to calculate the speed the camera was travelling when it hit the ground?

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Tags

NGSS.MS-PS2-4

If an object is free falling onto the Moon, which of the following would be correct?

• It would accelerate at 9.8 m/s²

• It would not encounter any air resistance.

• It would not fall because the Moon has no gravity.

• It would impact the surface and bounce back into space.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Heavier objects free fall faster than lighter objects.

• True

• False

Tags

NGSS.MS-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

What is the acceleration due to gravity on Earth?

Which of the following statements is true about free fall?

• Objects in free fall experience air resistance.

• Objects in free fall accelerate at a constant rate.

• Objects in free fall move at a constant speed.

• Objects in free fall do not experience gravity.

Tags

NGSS.MS-PS2-4

If a ball is dropped from a height, what will be its velocity after 3 seconds? (Ignore air resistance)

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1