Practice Problems
Normal Forces
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The numerical values in this worksheet are randomly generated allowing students the opportunity to conveniently practice, and drill, common situations.
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Directions:
On this worksheet you will be asked to calculate the magnitude of the normal force on mass
m
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?
68.6 N
1.4 N
0.7 N
0 N
omit
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 5 m/sec
2
?
33.60 N
44.8 N
68.6 N
103.6 N
omit
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 2.5 m/sec
2
?
2.73 x 10
1
N
7.7 x 10
0
N
5.11 x 10
1
N
6.86 x 10
1
N
omit
Question 4
What is the normal force acting on a 7-kg mass that is being pulled up a 35º frictionless inclined plane at a constant velocity of 5 m/sec?
1.97 x 10
2
N
5.62 x 10
1
N
6.86 x 10
1
N
3.93 x 10
1
N
omit
Question 5
What is the normal force acting on a 7-kg mass which is being pulled at a constant velocity of 5 m/sec by a rope having a tension of 37 newtons at an angle of 35º to the horizontal?
47.4 N
38.3 N
89.8 N
68.6 N
omit
Question 6
What is the normal force acting on a 7-kg mass which is being pushed at a constant velocity of 5 m/sec by a force of 37 newtons along a rigid handle that makes an angle of 35º to the horizontal?
47.4 N
38.3 N
98.9 N
89.8 N
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