Practice Problems
Normal Forces
Directions:
On this worksheet you will be asked to calculate the normal force depending on a variety of situations.
omit
Question 1
What is the normal force acting on a 9-kg mass that is at rest on a horizontal surface?
0 N
0.9 N
88.2 N
1.1 N
omit
Question 2
What is the normal force acting on a 9-kg mass that is sitting on the floor of an elevator which is accelerating upwards at a rate of 9 m/sec
2
?
7.20 N
90.8 N
88.2 N
169.2 N
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Question 3
What is the normal force acting on a 9-kg mass that is sitting on the floor of an elevator which is accelerating downwards at a rate of 4.5 m/sec
2
?
4.77 x 10
1
N
5.03 x 10
1
N
8.82 x 10
1
N
3.07 x 10
1
N
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Question 4
What is the normal force acting on a 9-kg mass that is being pulled up a 31º frictionless inclined plane at a constant velocity of 9 m/sec?
8.82 x 10
1
N
4.54 x 10
1
N
7.56 x 10
1
N
4.09 x 10
2
N
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Question 5
What is the normal force acting on a 9-kg mass which is being pulled at a constant velocity of 9 m/sec by a rope having a tension of 41 newtons at an angle of 31º to the horizontal?
67.1 N
109.3 N
53.1 N
88.2 N
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Question 6
What is the normal force acting on a 9-kg mass which is being pushed at a constant velocity of 9 m/sec by a force of 41 newtons along a rigid handle that makes an angle of 31º to the horizontal?
67.1 N
53.1 N
123.3 N
109.3 N
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