Newton's Laws of Motions

Open Ended

If a person hits a softball and a bowling ball with the same force, will they both accelerate at the same rate? Why or why not? Explain your answer.

Multiple Choice

What is the net force acting on the object in the diagram?

• 2 N

• 8 N

• 5 N

• 3 N

Open Ended

A strong adult pulls a desk to the right. At the same time, a small child pulls the desk to the left. What direction will the desk move? Why do you think it will move in that direction?

Multiple Choice

What will be the effect on the boy in the picture if the driver stops quickly?

• Because of inertia he will remain in the same position.

• He will be pushed back into the car seat.

• He will move from one side of the car seat to the other.

• He will move forward pressing against the seatbelt.

Multiple Choice

What is the force on a 1000 kg elevator that is falling freely at 9.8 m/s²? The answer to this question is most likely (HINT: Look at the units!!!) - 

• 9,800 N
• 9,800 m/s²
• 9,800 kg

Multiple Choice

According to Newton's Second Law, what happens to the acceleration of an object when more force is applied?

• The acceleration decreases

• The acceleration remains the same

• The acceleration increases

• The acceleration becomes zero

Multiple Choice

A truck accelerates at 5 m/s². Find the truck's mass if the driver applies a force of 425 N.

• 85 kg
• 850 kg
• 170 kg
• 17 kg

Multiple Choice

What is an example of Newton's Third Law?

• Kicking a soccer ball

• Throwing a basketball

• Pushing a car

• Pulling a wagon

Multiple Choice

According to Newton's Third Law, when a gun is shot, what happens to the bullet and the rifle?

• The bullet goes backward and the rifle goes forward.

• Both the bullet and rifle stay still.

• The bullet goes forward and the rifle kicks backward.

• The bullet disappears.

Multiple Choice

If a person pushes down on a trampoline, why do they move back up into the air?

• The trampoline pushes back with a greater force than the person

• The trampoline pushes back with less force than the person

• The trampoline pushes back with an equal and opposite force as the person

Multiple Choice

Which law is represented by the image?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's Law of Universal Gravitation

Multiple Choice

Which law is it? A person kicking a soccer ball and the ball applying an equal and opposite force to the person’s foot?

• Newton's 1st Law of Motion

• Newton's 2nd Law of Motion

• Newton's 3rd Law of Motion

• Newton's Law of Universal Gravitation

Open Ended

Calculate the mass of an object that is accelerating 14 m/s2 with a force of 280 N.

Draw

During an accident, the seatbelt and airbag stop the crash test dummy with a force of 90N. Using your knowledge of Newton's 3rd law, draw arrows showing the directions of the action and reaction forces, and label the magnitude (Strength) of each force.

Poll

How confident do you feel about this topic now?

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• Somewhat confident
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