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Laabri

Mastery Check 3-9 (b)

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Last updated 8 months ago
7 Nsɛmmisa
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1.

Mastery checks are pledged activities. You may ONLY use: a calculator. No assistance from notes, friends, the internet, etc.

You may write "I pledge" and sign your name here.

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2.

Which of the following is true about your net force if you are standing stationary on a bathroom scale?

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3.

Which of the following is true about the forces acting on you if you are in an elevator accelerating upwards?

A 32 kg boy is standing in an elevator.

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4.

Before the elevator starts moving, his normal force (Fn) is greater than his weight (Fg) because he is standing up.

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5.

What is the force of gravity pulling down on the boy?

Show your work (use the calculation rubric)

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6.

The elevator then starts accelerating downwards at 0.3 m/s2. What is the net force acting on the boy?

Show your work (use the calculation rubric)

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7.

Therefore, what is the normal force acting on the boy as the elevator accelerates downwards?