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 3-kg mass that is at rest on a horizontal surface?
0 N
3.3 N
0.3 N
29.4 N
omit
Question 2
What is the normal force acting on a 3-kg mass that is sitting on the floor of an elevator which is accelerating upwards at a rate of 6 m/sec
^{2}
?
47.4 N
27.8 N
29.4 N
11.40 N
omit
Question 3
What is the normal force acting on a 3-kg mass that is sitting on the floor of an elevator which is accelerating downwards at a rate of 3 m/sec
^{2}
?
8 x 10
^{-1}
N
1.88 x 10
^{1}
N
2.04 x 10
^{1}
N
2.94 x 10
^{1}
N
omit
Question 4
What is the normal force acting on a 3-kg mass that is being pulled up a 31º frictionless inclined plane at a constant velocity of 6 m/sec?
2.94 x 10
^{1}
N
9.09 x 10
^{1}
N
2.52 x 10
^{1}
N
1.51 x 10
^{1}
N
omit
Question 5
What is the normal force acting on a 3-kg mass which is being pulled at a constant velocity of 6 m/sec by a rope having a tension of 41 newtons at an angle of 31º to the horizontal?
8.3 N
-5.7 N
29.4 N
50.5 N
omit
Question 6
What is the normal force acting on a 3-kg mass which is being pushed at a constant velocity of 6 m/sec by a force of 41 newtons along a rigid handle that makes an angle of 31º to the horizontal?
50.5 N
64.5 N
-5.7 N
8.3 N
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