Ball A is dropped from rest from a window. At the same instant, ball B is thrown downward; and ball C is thrown upward from the same window. Which statement concerning the balls after their release is necessarily true if air resistance is neglected?

All three balls have the same acceleration at any instant.

At some instant after it is thrown, the acceleration of ball C is zero.

All three balls have the same initial velocity.

All three balls have the same velocity at any instant.

1. In analyzing freely falling bodies, we neglect the effect of ___ to the object.

D. all forces except air resistance

2. A freely falling object's motion is under the sole influence of ____.

D. applied forces such as a persons push or pull

Free Fall Motion

Authored by Leanne Sanders

Physics

9th - 12th Grade

NGSS covered

Used 163+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground

the acceleration increases

the acceleration decreases

the acceleration remains constant

Tags

NGSS.HS-PS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

the acceleration increases

the acceleration decreases

the acceleration remains constant

Tags

NGSS.HS-PS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The acceleration due to gravity near the surface of Earth is equal to

9.8 m/s

9.8 kg x m/s

9.8 N

9.8 m/s²

Tags

NGSS.HS-PS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?

They don't; they hit the ground at the same time.

One is more dense than the other.

One is heavier than the other.

Air resistance

Tags

MS-PS2-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

An object in free fall

ignores air resistance.

undergoes a downward acceleration.

has an acceleration of -9.8 m/s².

all of these.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

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Free Fall Motion

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

A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground

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

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

The acceleration due to gravity near the surface of Earth is equal to

In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?

An object in free fall

Ball A is dropped from rest from a window. At the same instant, ball B is thrown downward; and ball C is thrown upward from the same window. Which statement concerning the balls after their release is necessarily true if air resistance is neglected?

Heavier objects free fall faster than lighter objects.

1. In analyzing freely falling bodies, we neglect the effect of ___ to the object.

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