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 9-kg mass that is at rest on a horizontal surface?
88.2 N
0 N
0.9 N
1.1 N
omit
Question 2
What is the normal force acting on a 9-kg mass that is sitting on the floor of an elevator which is accelerating upwards at a rate of 11 m/sec
^{2}
?
10.80 N
187.2 N
88.2 N
108.8 N
omit
Question 3
What is the normal force acting on a 9-kg mass that is sitting on the floor of an elevator which is accelerating downwards at a rate of 5.5 m/sec
^{2}
?
5.93 x 10
^{1}
N
3.87 x 10
^{1}
N
8.82 x 10
^{1}
N
3.97 x 10
^{1}
N
omit
Question 4
What is the normal force acting on a 9-kg mass that is being pulled up a 31º frictionless inclined plane at a constant velocity of 11 m/sec?
5 x 10
^{2}
N
7.56 x 10
^{1}
N
8.82 x 10
^{1}
N
4.54 x 10
^{1}
N
omit
Question 5
What is the normal force acting on a 9-kg mass which is being pulled at a constant velocity of 11 m/sec by a rope having a tension of 30 newtons at an angle of 31º to the horizontal?
103.7 N
62.5 N
72.7 N
88.2 N
omit
Question 6
What is the normal force acting on a 9-kg mass which is being pushed at a constant velocity of 11 m/sec by a force of 30 newtons along a rigid handle that makes an angle of 31º to the horizontal?
72.7 N
62.5 N
113.9 N
103.7 N
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