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WorksheetsScience: Newton's 3rd Law of Motion
Total questions: 15
Worksheet time: 8mins
What is Newton's 3rd Law of Motion?
An object at rest stays at rest and an object in motion stays in motion unless acted on by an outside force.
An object's acceleration depends on the mass of the object and the size and direction of the force acting on it.
Every action has an equal and opposite reaction.
There is no third law.
When one object exerts a force upon a second object, the second object exerts an equal and opposite force upon the first object.
True
False
What would happen if you were leaning against a tree with a force, but the tree did not push back with equal force?
Nothing.
The tree would push you forward.
You would push the tree backwards.
What are actions?
What you do.
The fact or process you take to achieve something.
We never learned about this.
Reactions.
What's a reaction?
When an action is performed to get the effect of the situation.
We never learned about this.
An action.
Something you get from doing something.
What would be an action? What would be the reaction?
Action: Your foot stepping on the ground. Reaction: Your foot push off the ground and going upward.
Action: Your foot stepping on the ground. Reaction: You falling.
Action: You applying no force. Reaction: Your foot push off the ground and going upward.
What happens when a frog jumps off of one lily pad, to another.
The lily pad stays still.
The frog falls into the water.
The lily pad pushes backwards.
The lily pad goes forward.
How come a rocket works better in space because the gases can be pushed backward more easily?
Space does not have air particles to slow down the gases.
Space has no gravity.
Space defies the third law of motion.
Which ride/game in an amusement park can be an example of Newton' s third law of motion?
Roller coaster
Ferris wheel
Whack-a-mole
Bumper cars
Merry-go-round
Why are bumper cars a good example of Newton' s third law of motion?
When two cars hit, they both exert equal and opposite forces and slide backwards.
Friction stops the cars.
They need to accelerate to drive the car.
If the cars crash, the people inside will fly out of the car without a seat belt.
If you were leaning on your desk and the desk didn't exert an equal and opposite force on you, what would happen?
Nothing.
The desk would fly up.
They desk would fall through the floor.
None of these answer choices.
Is it true that when you lean against a brick wall, both you and the wall are exerting equal and opposite forces?
Yes
No
Wherever you are right now, are both you and whatever you are exerting a force on both exerting equal and opposite forces against each other?
Yes
No
You lean against a tree, pushing on it with a force of 110N west. What are the magnitude and direction of the force that the tree exerts on you?
0
110 Newtons west
110 newtons east
110
You and your sister are standing back to back to see who's taller. Your sister is 85 lbs and you are 60 lbs. You push against your sister and both fly forward but she moves slower away from you. Why is this?
You both exert equal and opposite forces on each other but she has more mass so she goes slowly.
It is a coincidence.
She didn't exert a force, only you did.
She had more friction.
