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
78.4 N
0 N
1.2 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 7 m/sec
2
?
22.40 N
134.4 N
65.8 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 3.5 m/sec
2
?
5.04 x 10
1
N
1.82 x 10
1
N
3.78 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 30º frictionless inclined plane at a constant velocity of 7 m/sec?
2.74 x 10
2
N
6.79 x 10
1
N
3.92 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 7 m/sec by a rope having a tension of 41 newtons at an angle of 30º to the horizontal?
57.9 N
98.9 N
78.4 N
42.9 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 7 m/sec by a force of 41 newtons along a rigid handle that makes an angle of 30º to the horizontal?
57.9 N
98.9 N
42.9 N
113.9 N
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