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 4-kg mass that is at rest on a horizontal surface?
0.4 N
39.2 N
0 N
2.5 N
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Question 2
What is the normal force acting on a 4-kg mass that is sitting on the floor of an elevator which is accelerating upwards at a rate of 8 m/sec
2
?
41.8 N
7.20 N
39.2 N
71.2 N
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Question 3
What is the normal force acting on a 4-kg mass that is sitting on the floor of an elevator which is accelerating downwards at a rate of 4 m/sec
2
?
2.32 x 10
1
N
6.2 x 10
0
N
3.92 x 10
1
N
2.58 x 10
1
N
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Question 4
What is the normal force acting on a 4-kg mass that is being pulled up a 37º frictionless inclined plane at a constant velocity of 8 m/sec?
2.36 x 10
1
N
3.92 x 10
1
N
3.13 x 10
1
N
1.89 x 10
2
N
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Question 5
What is the normal force acting on a 4-kg mass which is being pulled at a constant velocity of 8 m/sec by a rope having a tension of 49 newtons at an angle of 37º to the horizontal?
39.2 N
0.1 N
68.7 N
9.7 N
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Question 6
What is the normal force acting on a 4-kg mass which is being pushed at a constant velocity of 8 m/sec by a force of 49 newtons along a rigid handle that makes an angle of 37º to the horizontal?
9.7 N
68.7 N
0.1 N
78.3 N
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