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Mastery Check 3-9 (b)

Last updated 3 months ago

7 questions

1

Question 1

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.

1

1

Question 2

2.

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

Your net force points upwards

Your net force points downwards

Your net force is zero

Question 3

3.

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

Fn > Fg

Fn = Fg

Fn < Fg

A 32 kg boy is standing in an elevator. 

2

Question 4

4.

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

True

False

2

2

2

Question 5

5.

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

Show your work (use the calculation rubric)

Question 6

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)

Question 7

7.

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