Force and Newton's Laws

What is Mass?

• Anything that has matter and takes up space
• The measure of gravitational force exerted on an object
• The measure of the amount of atoms in an object

Safety belts protect people in cars in the event of an accident because, according to Newton’s laws of motion, when an impact causes the car to suddenly change its motion...

• the people in the car will continue to move in the same direction and at the same speed as before the impact
• the speed of the car always increases, giving it greater force since the mass will remain the same.
• the car now has a greater overall mass - its own mass plus the mass of the object by which it has been struck

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A flowerpot exerts a downward force of 35 N on a shelf. Which force prevents the flowerpot from pushing through the shelf and landing on the floor?

• A 35 N force of Earth pushing up on the flowerpot
• A 35 N force of the shelf pushing up on the flowerpot
• A 70 N force of the Earth pushing up on the flowerpot

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What is the net force of the picture?

• 400N to the Right
• 0N
• 400N to the Left

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Which of the following diagrams represents the third law of motion?

• 
• 
• 

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What will happen if the mass remains the same, but the net force is increased?

• Constant speed
• Acceleration
• Not enough information has been given

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Examine the image. The man in this recliner is exhibiting which of the following?

• Accleration
• Inertia
• Time

True or False: The mass of an object is always equal to the weight of that object.

• True
• False

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A block kept on a friction-less horizontal surface is acted on by a force of 100 N, as shown in the figure. What magnitude of force must be applied on the block from the opposite direction to stop its motion?

• 75 N
• 100 N
• 200 N

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Two opposing forces are acting on a box. Which set of forces will cause the box to move to the RIGHT?

• a = 12 N, b = 13 N
• a = 15 N, b = 14 N
• a = 0 N, b = 6 N

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