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 6 m/sec
2
?
30.40 N
126.4 N
78.4 N
57.8 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 3 m/sec
2
?
3.38 x 10
1
N
5.44 x 10
1
N
7.84 x 10
1
N
1.42 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 25º frictionless inclined plane at a constant velocity of 6 m/sec?
1.99 x 10
2
N
7.11 x 10
1
N
3.31 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 6 m/sec by a rope having a tension of 32 newtons at an angle of 25º to the horizontal?
64.9 N
49.4 N
78.4 N
91.9 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 6 m/sec by a force of 32 newtons along a rigid handle that makes an angle of 25º to the horizontal?
64.9 N
107.4 N
49.4 N
91.9 N
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