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?
78.4 N
0 N
1.2 N
0.8 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 10 m/sec
2
?
1.60 N
78.4 N
158.4 N
89.8 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 5 m/sec
2
?
3.84 x 10
1
N
4.98 x 10
1
N
7.84 x 10
1
N
3.02 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 26º frictionless inclined plane at a constant velocity of 10 m/sec?
3.44 x 10
2
N
7.05 x 10
1
N
7.84 x 10
1
N
3.44 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 10 m/sec by a rope having a tension of 36 newtons at an angle of 26º to the horizontal?
78.4 N
94.2 N
62.6 N
46.0 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 10 m/sec by a force of 36 newtons along a rigid handle that makes an angle of 26º to the horizontal?
62.6 N
46.0 N
94.2 N
110.8 N
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