What is the primary concept described by Newton's First Law of Motion?

• Force equals mass times acceleration.

• For every action, there is an equal and opposite reaction.

• An object's resistance to a change in motion.

• Gravity is an invisible force.

The reason you keep moving forward when the car you're riding in suddenly brakes is due to

Which object has more inertia: a feather, a tennis ball, or a bowling ball?

A ​ (a)   has the most inertia because it has the greatest ​ (b)   .

• bowling ball
• mass
• feather
• tennis ball

A 5 kg sled is pulled with a net force of 20 N across the ice. What is the acceleration of the sled?

• 0.25 m/s²

• 4 m/s²

• 2.5 m/s²

• 100 m/s²

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Which of the following statements correctly describe the relationship in Newton's Second Law?

• If you increase the mass, acceleration decreases (for the same force).

• If you increase the net force, acceleration increases (for the same mass).

• Force is directly proportional (increase or decrease together) to acceleration.

• All of the above.

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A Roland Grise volleyball player served a volleyball with a Mass of 0.22 kilograms with a Force of 55 Newtons. How fast in meters per second squared did the volleyball player accelerate the volleyball?

Mathematical Equivalence

ON

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A bird is flying. The action force is the bird's wings pushing air downward. What is the reaction force?

• The bird accelerating downward.

• The air being displaced.

• The bird's weight pulling it down.bir

• The air pushing the bird upward.

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This is an example of which of Newton's Laws?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's Law of Inertia

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Label the Action and the Reaction.

a

b

The trampoline pushes up on the boy.

The boy pushes up on the trampoline

The boy pushes down on the trampoline.

The trampoline pushes down on the boy

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A tennis player hits a ball with a racket.

Which of Newton's Laws are involved in this action?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• All of the above

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