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 7-kg mass that is at rest on a horizontal surface?
1.4 N
68.6 N
0 N
0.7 N
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Question 2
What is the normal force acting on a 7-kg mass that is sitting on the floor of an elevator which is accelerating upwards at a rate of 9 m/sec
2
?
5.60 N
72.8 N
68.6 N
131.6 N
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Question 3
What is the normal force acting on a 7-kg mass that is sitting on the floor of an elevator which is accelerating downwards at a rate of 4.5 m/sec
2
?
6.86 x 10
1
N
2.17 x 10
1
N
3.71 x 10
1
N
4.13 x 10
1
N
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Question 4
What is the normal force acting on a 7-kg mass that is being pulled up a 34º frictionless inclined plane at a constant velocity of 9 m/sec?
3.45 x 10
2
N
6.86 x 10
1
N
3.84 x 10
1
N
5.69 x 10
1
N
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Question 5
What is the normal force acting on a 7-kg mass which is being pulled at a constant velocity of 9 m/sec by a rope having a tension of 25 newtons at an angle of 34º to the horizontal?
54.6 N
68.6 N
47.9 N
82.6 N
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Question 6
What is the normal force acting on a 7-kg mass which is being pushed at a constant velocity of 9 m/sec by a force of 25 newtons along a rigid handle that makes an angle of 34º to the horizontal?
54.6 N
82.6 N
89.3 N
47.9 N
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