Newton's Third Law States...

For each action there is an equal and opposite reaction

Objects in motion stay in motion and objects at rest stay at rest

Force is equal to mass times acceleration

An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...

the arrow's push against the bowstring

the grip of the archer's hand on the bow

What is the reaction force when a rocket's engines release hot gases?

The gases push back on the rocket.

The gases pull the rocket forward.

A group of students was responsible for creating an object that demonstrates Newton’s third law of motion. They decided to create a balloon air rocket. Which of the following does NOT correctly describe how the air rocket works?

The action force is larger than the reaction force.

The action force is air coming out of the balloon, while the reaction force is the balloon moving forward.

The action and reaction forces are equal in magnitude.

The balloon pushing on the air moves in the opposite direction from the air pushing on the balloon.

How would you describe the forces at work on the vase below?

The force of gravity is pulling down on the vase, but it is balanced by the normal force pushing upward. The object is at rest because the forces are balanced.

The force of gravity is stronger than the normal force.

The normal force is stronger than the force of gravity.

There are no forces acting on the vase because it is at rest. Forces are only at work if an object is moving.

What is the reaction force to a foot pushing down on the staircase?

B. The staircase pushing back against the foot

A. The foot going through the stairs

C. The staircase breaking the foot

D. The staircase pushing against the floor below

A swimmer pushes on the water and the water pushes on the hand and the swimmer moves forward. What is the ACTION force?

B. The water pushes on the body of the swimmer.

A. The swimmer pushes on the water.

An empty car on a steep street rolls downhill and collides with a concrete wall. The car is damaged, but the concrete wall isn’t. What’s true about the strength of the forces in this situation?

The forces exerted by the car and the wall were equal.

The force exerted by the car was greater because it was moving.

The force on the wall was greater because it wasn't damaged.

No forces were exerted in this collision because the car was empty.

When a bird flaps its wings downward, what is the reaction force according to Newton's Third Law?

The air pushes the bird upward.

The air pushes the bird downward.

In a game of tug-of-war, if both teams pull with equal force, what will happen according to Newton's Third Law?

The forces will cancel each other out, and the rope will not move.

The ground will exert a force on the teams.

What happens to the forces when a hammer strikes a nail?

The hammer exerts a force on the nail, and the nail exerts an equal and opposite force on the hammer.

The hammer exerts a greater force on the nail.

The nail exerts a greater force on the hammer.

Third Law of Motion Practice: TEKS 6.7C

Authored by Test Ochoa

Science

6th - 8th Grade

NGSS covered

Used 4+ times

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27 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backward because -

the mass of the skateboard is the same as the mass of the person jumping off.

the pull of gravity on the person is the same as on the skateboard, regardless of size.

the air resistance on the person is great and the friction on the skateboard is small.

for the force that sent the person forward, there is an equal force pushing back on the skateboard.

Tags

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A book pushes down on a table with a force of 5N, the table..

Pushes back with a force of 5N

Pushes back with a force less than 5N

Pushes back with a forcec greater than 5N

Does nothing. A table has no force.

Tags

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A ball bat hits aball with a force of 100 Newtons. What is the force and direction exerted by the ball on the bat?

100 Newtons, same direction

100 Newtons, opposite direction

200 Newtons, same direction

200 Newtons, opposite direction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to Newton’s Third Law, when you lean on a wall, which force is greater?

the wall's force

your force

the force of friction

they are equal

Tags

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of Newton's Laws of Motion does this Newton's cradle demonstrate?

Newton's 1st Law of Motion (interia)

Newton's 2nd Law of Motion (F=m * a)

Newton's 3rd Law of Motion (action-reaction)

Tags

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which is an example of 3rd Law?

A ball rolling down a lane.

A spinning top

Flowing water

Paper on a desk

Tags

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Two metal spheres are suspended on wires so that they hang next to each other, just touching. Sphere X is raised to a certain height and released. Describe what would happen to Sphere Y.

Sphere Y will swing away from sphere X, half as far up as sphere Y had started.

Sphere Y will swing away from the sphere X, just as far up as shpere Y had started.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-5

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Third Law of Motion Practice: TEKS 6.7C

According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backward because -

A book pushes down on a table with a force of 5N, the table..

A ball bat hits aball with a force of 100 Newtons. What is the force and direction exerted by the ball on the bat?

According to Newton’s Third Law, when you lean on a wall, which force is greater?

Which of Newton's Laws of Motion does this Newton's cradle demonstrate?

Which is an example of 3rd Law?

Two metal spheres are suspended on wires so that they hang next to each other, just touching. Sphere X is raised to a certain height and released. Describe what would happen to Sphere Y.

Newton's are the unit used to measure...

All forces occur in pairs

A push or pull on an object is

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