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 4-kg mass that is at rest on a horizontal surface?
0.4 N
39.2 N
0 N
2.5 N
omit
Question 2
What is the normal force acting on a 4-kg mass that is sitting on the floor of an elevator which is accelerating upwards at a rate of 7 m/sec
2
?
37.8 N
11.20 N
67.2 N
39.2 N
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Question 3
What is the normal force acting on a 4-kg mass that is sitting on the floor of an elevator which is accelerating downwards at a rate of 3.5 m/sec
2
?
3.92 x 10
1
N
2.52 x 10
1
N
2.38 x 10
1
N
4.2 x 10
0
N
omit
Question 4
What is the normal force acting on a 4-kg mass that is being pulled up a 43º frictionless inclined plane at a constant velocity of 7 m/sec?
2.67 x 10
1
N
2.87 x 10
1
N
1.87 x 10
2
N
3.92 x 10
1
N
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Question 5
What is the normal force acting on a 4-kg mass which is being pulled at a constant velocity of 7 m/sec by a rope having a tension of 38 newtons at an angle of 43º to the horizontal?
11.4 N
65.1 N
13.3 N
39.2 N
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Question 6
What is the normal force acting on a 4-kg mass which is being pushed at a constant velocity of 7 m/sec by a force of 38 newtons along a rigid handle that makes an angle of 43º to the horizontal?
65.1 N
11.4 N
67.0 N
13.3 N
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