Physics Unit 3 - Dynamics (Practice Test)

What is the net force?

• 17 N Right
• 3 N Right
• 3 N Left
• 17 N Left

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What is the SI unit for force?

• Grams (g)

• Hectogram (Hg)

• Newtons (N)

• Meters (m)

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Calculate the net force. 

• 60N, Left 

• 40N, Right 

• 0N

• 60N, Right

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Which of the following laws states that for every action there is an equal and opposite reaction?

• The law of conservation of momentum

• Newton's 1st Law of Motion

• Newton's 2nd Law of Motion

• Newton's 3rd Law of Motion

What happens to the inertia of an object if its mass increases?

• It decreases.

• It remains constant.

• It increases then decreases

• It increases

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If you exert a net force of 8 N on a 2-kg object, what will its acceleration be?

• 2 m/s²
• 4 m/s²
• 16 m/s²
• 10 m/s²

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An object at rest will remain at rest, and an object in motion will continue in motion at constant velocity unless acted upon by an unbalanced force.

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

If you weigh 678 N on Earth, what is your mass?

• 69.1 kg
• 6650 kg
• 0.0144 kg
• 678 kg

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If you weigh 574 N on Earth, what would you weigh on the Moon (g = 1.60 m/s²)?

• 93.6 N

• 58.5 N

• 359 N

• 918 N

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If you weigh 610 N on Earth and 920 N on planet X, what is the acceleration due to gravity on planet X?

• 14.8 m/s²

• 6.57 m/s²

• 13.9 m/s²

• 15.2 m/s²

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