Understanding Newton's Laws of Motion

Which of the following best describes Newton's First Law of Motion?

• An object in motion will eventually stop unless acted upon by an external force.

• An object at rest will remain at rest, and an object in motion will remain in motion unless acted upon by an external unbalanced force.

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

• The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

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DOK Level 1: Recall

According to Newton's Second Law of Motion, what is the formula for force?

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DOK Level 1: Recall

Which of the following scenarios best illustrates Newton's Third Law of Motion?

• A person pushing a wall and the wall pushing back with equal force.

• A car accelerating on a highway.

• A ball falling to the ground due to gravity.

• A satellite orbiting the Earth.

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DOK Level 1: Recall

If a 10 kg object is subjected to a net force of 50 N, what is its acceleration?

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DOK Level 2: Skill/Concept

Which of the following statements is true about mass and weight?

• Mass and weight are the same and can be used interchangeably.

• Mass is a measure of the amount of matter in an object, while weight is the force exerted by gravity on that object.

• Weight is a measure of the amount of matter in an object, while mass is the force exerted by gravity on that object.

• Both mass and weight change depending on the location of the object.

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DOK Level 1: Recall

• 8N

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DOK Level 2: Skill/Concept

Which of the following is an application of Newton's First Law of Motion?

• A spacecraft continuing to move in space without using its engines.

• A ball falling to the ground due to gravity.

• A person pushing a wall and the wall pushing back with equal force.

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DOK Level 2: Skill/Concept

What happens to the acceleration of an object if the net force acting on it is doubled, assuming the mass remains constant?

• The acceleration is halved.

• The acceleration remains the same.

• The acceleration is doubled.

• The acceleration is quadrupled.

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DOK Level 2: Skill/Concept

Which of the following best describes the relationship between force, mass, and acceleration?

• If the mass of an object doubles, it would require twice the force to make it accelerate the same amount.

• If the mass of an object doubles, it would only take half of the force to make it accelerate the same amount.

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DOK Level 1: Recall

If a 20 kg object is subjected to a net force of 100 N, what is its acceleration?

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DOK Level 2: Skill/Concept