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
0.7 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}
?
103.6 N
44.8 N
33.60 N
68.6 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
5.11 x 10
^{1}
N
7.7 x 10
^{0}
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 30º frictionless inclined plane at a constant velocity of 5 m/sec?
6.86 x 10
^{1}
N
1.72 x 10
^{2}
N
3.43 x 10
^{1}
N
5.94 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 29 newtons at an angle of 30º to the horizontal?
54.1 N
83.1 N
43.5 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 29 newtons along a rigid handle that makes an angle of 30º to the horizontal?
54.1 N
93.7 N
43.5 N
83.1 N
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