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?
0.8 N
0 N
1.2 N
78.4 N
omit
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}
?
65.8 N
22.40 N
134.4 N
78.4 N
omit
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
7.84 x 10
^{1}
N
1.82 x 10
^{1}
N
3.78 x 10
^{1}
N
omit
Question 4
What is the normal force acting on a 8-kg mass that is being pulled up a 35º frictionless inclined plane at a constant velocity of 7 m/sec?
6.42 x 10
^{1}
N
3.15 x 10
^{2}
N
4.5 x 10
^{1}
N
7.84 x 10
^{1}
N
omit
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 49 newtons at an angle of 35º to the horizontal?
78.4 N
50.3 N
38.3 N
106.5 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 49 newtons along a rigid handle that makes an angle of 35º to the horizontal?
38.3 N
50.3 N
106.5 N
118.5 N
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