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
0.3 N
3.3 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 7 m/sec
^{2}
?
8.40 N
50.4 N
29.4 N
30.8 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 3.5 m/sec
^{2}
?
7 x 10
^{-1}
N
2.94 x 10
^{1}
N
2.03 x 10
^{1}
N
1.89 x 10
^{1}
N
omit
Question 4
What is the normal force acting on a 3-kg mass that is being pulled up a 40º frictionless inclined plane at a constant velocity of 7 m/sec?
1.32 x 10
^{2}
N
1.89 x 10
^{1}
N
2.94 x 10
^{1}
N
2.25 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 7 m/sec by a rope having a tension of 39 newtons at an angle of 40º to the horizontal?
29.4 N
4.3 N
54.5 N
-0.5 N
omit
Question 6
What is the normal force acting on a 3-kg mass which is being pushed at a constant velocity of 7 m/sec by a force of 39 newtons along a rigid handle that makes an angle of 40º to the horizontal?
4.3 N
59.3 N
54.5 N
-0.5 N
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