Instantaneous Speed in Freefall

What is the formula to calculate velocity during freefall?

• v = a * t

• v = a + t

• v = t * 2

• v = a / t

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NGSS.HS-PS2-4

If an object is in freefall for 3 seconds, what is its velocity?

• 10 m/s

• 45 m/s

• 30 m/s

• 20 m/s

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NGSS.MS-PS2-2

NGSS.MS-PS3-1

How does the acceleration due to gravity affect the velocity of a falling object?

• The acceleration due to gravity increases the velocity of a falling object, causing it to fall faster over time.

• The velocity of a falling object remains constant regardless of gravity.

• The acceleration due to gravity decreases the velocity of a falling object.

• Gravity has no effect on the velocity of a falling object.

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NGSS.MS-PS2-2

What is the instantaneous speed of an object after 5 seconds of freefall?

• 30 m/s

• 20 m/s

• 75 m/s

• 50 m/s

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NGSS.MS-PS3-1

Explain how air resistance affects the speed of a falling object.

• Air resistance only affects objects that are not falling vertically.

• Air resistance increases the speed of a falling object.

• Air resistance has no effect on the speed of a falling object.

• Air resistance decreases the speed of a falling object until it reaches terminal velocity.

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NGSS.MS-PS2-2

What is the difference between instantaneous speed and average speed in freefall?

• Instantaneous speed is the speed at a specific moment; average speed is total distance divided by total time.

• Average speed is the speed at a specific moment; instantaneous speed is total distance divided by total time.

• Instantaneous speed is calculated by averaging speeds over time.

• Instantaneous speed is always greater than average speed.

How does the mass of an object influence its freefall speed in the absence of air resistance?

• Objects with more mass experience greater air resistance.

• Heavier objects fall faster than lighter ones.

• The mass of an object does not influence its freefall speed in the absence of air resistance.

• Mass increases the acceleration of freefall.

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NGSS.MS-PS2-2

Heavier objects free fall faster than lighter objects in the absence of air resistance.

• True

• False

A ship starts out moving at 14 m/s. It catches a breeze that accelerates it at 0.80 m/s² for 25 s. How fast is it moving at the end of the 25 s?

• 34 m/s

• 20 m/s

• -6 m/s

• 11.2 m/s

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NGSS.MS-PS2-2

If you throw a ball straight up, what is its velocity at the highest point?

• 10 m/s

• 0.0 m/s

• 10 m/s

• 10.0 m/s²

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