A book rests on a table. The force of gravity pulls down on the book with a force of 20 newtons. What prevents the books from accelerating downward?

The table presses back up on the book with an equal and opposite force of 20 newtons.

The table and the book together are accelerating downwards

The table presses back up on the book with a force greater than 20 newtons.

Look back at the previous two questions. Why does it take more force to accelerate #16 than #15 even though they have the same rate of acceleration?

#16 has more mass, so it needs more force to accelerate

#15 has more mass, so it needs less force to accelerate

mass is not related to acceleration

#16 does not need more force than #15

Select the answer that best describes how Newton's 3rd Law of Motion (action/reaction) applies in the photo.

The skateboard is pushed forward as the foot pushes backward

The skateboard is pushed up and the foot pushes down

The skateboard is launched backwards as the foot pushes backwards

Select the answer that best describes how Newton's 3rd Law of Motion (action/reaction) applies in the photo.

The balloon is pushed to the left as the air pushes to the right

The balloon is pushed to the right as the air pushes to the right

The balloon is pushed up as the air pushes down

Select the answer that best describes how Newton's 3rd Law of Motion (action/reaction) applies in the photo.

The rocket is pushed up as the fuel pushes down

The rocket is pushed down as the fuel pushes down

The rocket is pushed up as the fuel pushes up

Unit 5 Assessment

Authored by Alicen Adkins

Science

7th Grade

NGSS covered

Used 1+ times

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OPEN ENDED QUESTION

30 sec • Ungraded

Name (Last, First)

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MULTIPLE CHOICE QUESTION

30 sec • 3 pts

This law of motion states that heavier objects need a larger force to make them move

Newton's 1st Law of Motion

Newton's 2nd Law of Motion

Newton's 3rd Law of Motion

This law of motion states that for every action there is an equal and opposite reaction

Newton's 1st Law of Motion

Newton's 2nd Law of Motion

Newton's 3rd Law of Motion

This law of motion states that an object’s motion won’t change unless acted upon by an outside force

Newton's 1st Law of Motion

Newton's 2nd Law of Motion

Newton's 3rd Law of Motion

MULTIPLE CHOICE QUESTION

30 sec • 3 pts

A force resulting from two objects rubbing against each other

Balanced Force

Gravity

Friction

Acceleration

MULTIPLE CHOICE QUESTION

30 sec • 3 pts

A force caused by air, acting in the opposite direction of a moving object

Gravity

Friction

Acceleration

Air Resistance

MULTIPLE CHOICE QUESTION

30 sec • 3 pts

When two forces on an object cancel each other out, they do not affect the motion of the object

Unbalanced Force

Balanced Force

Gravity

Friction

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Unit 5 Assessment

Name (Last, First)

This law of motion states that heavier objects need a larger force to make them move

This law of motion states that for every action there is an equal and opposite reaction

This law of motion states that an object’s motion won’t change unless acted upon by an outside force

A force resulting from two objects rubbing against each other

A force caused by air, acting in the opposite direction of a moving object

When two forces on an object cancel each other out, they do not affect the motion of the object

When one force is stronger than the other forces on an object, they do affect the motion of an object

the speeding up (or down) of an object

Calculate the net force and direction, and tell if the forces are balanced or unbalanced.

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