Practice Problems
Normal Forces
Directions:
On this worksheet you will be asked to calculate the normal force depending on a variety of situations.
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Question 1
What is the normal force acting on a 8-kg mass that is at rest on a horizontal surface?
0.8 N
1.2 N
78.4 N
0 N
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Question 2
What is the normal force acting on a 8-kg mass that is sitting on the floor of an elevator which is accelerating upwards at a rate of 8 m/sec
2
?
14.40 N
142.4 N
73.8 N
78.4 N
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Question 3
What is the normal force acting on a 8-kg mass that is sitting on the floor of an elevator which is accelerating downwards at a rate of 4 m/sec
2
?
4.18 x 10
1
N
4.64 x 10
1
N
2.22 x 10
1
N
7.84 x 10
1
N
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Question 4
What is the normal force acting on a 8-kg mass that is being pulled up a 29º frictionless inclined plane at a constant velocity of 8 m/sec?
3.04 x 10
2
N
6.86 x 10
1
N
3.8 x 10
1
N
7.84 x 10
1
N
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Question 5
What is the normal force acting on a 8-kg mass which is being pulled at a constant velocity of 8 m/sec by a rope having a tension of 32 newtons at an angle of 29º to the horizontal?
78.4 N
50.4 N
93.9 N
62.9 N
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Question 6
What is the normal force acting on a 8-kg mass which is being pushed at a constant velocity of 8 m/sec by a force of 32 newtons along a rigid handle that makes an angle of 29º to the horizontal?
62.9 N
50.4 N
93.9 N
106.4 N
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