Practice Problems
Normal Forces
Directions:
On this worksheet you will be asked to calculate the normal force depending on a variety of situations.
omit
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
0.8 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 5 m/sec
2
?
38.40 N
78.4 N
49.8 N
118.4 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 2.5 m/sec
2
?
1.02 x 10
1
N
5.84 x 10
1
N
2.98 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 5 m/sec?
1.9 x 10
2
N
3.8 x 10
1
N
7.84 x 10
1
N
6.86 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 5 m/sec by a rope having a tension of 42 newtons at an angle of 29º to the horizontal?
98.8 N
41.7 N
58.0 N
78.4 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 5 m/sec by a force of 42 newtons along a rigid handle that makes an angle of 29º to the horizontal?
115.1 N
98.8 N
58.0 N
41.7 N
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