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Mastery Check 3-9 (b)
By Physics Teacher
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Last updated 6 months ago
7 questions
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1
1
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.
visibility
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Question 2
2.
Question 3
3.
A 32 kg boy is standing in an elevator.
2
2
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
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
Question 4
4.
Question 5
5.
What is the force of gravity pulling down on the boy?
Show your work (use the calculation rubric)
visibility
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Question 6
6.
The elevator then starts accelerating downwards at 0.3 m/s
2
. What is the
net force
acting on the boy?
Show your work (use the calculation rubric)
visibility
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Question 7
7.
Therefore, what is the normal force acting on the boy as the elevator accelerates downwards?
visibility
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Before the elevator starts moving, his normal force (F
n
) is greater than his weight (F
g
) because he is standing up.
True
False