Practice Problems
Normal Forces
Directions:
On this worksheet you will be asked to calculate the normal force depending on a variety of situations.
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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
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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 5 m/sec
2
?
24.8 N
44.4 N
29.4 N
14.40 N
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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 2.5 m/sec
2
?
2.3 x 10
0
N
2.19 x 10
1
N
1.73 x 10
1
N
2.94 x 10
1
N
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Question 4
What is the normal force acting on a 3-kg mass that is being pulled up a 41º frictionless inclined plane at a constant velocity of 5 m/sec?
9.64 x 10
1
N
2.94 x 10
1
N
2.22 x 10
1
N
1.93 x 10
1
N
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Question 5
What is the normal force acting on a 3-kg mass which is being pulled at a constant velocity of 5 m/sec by a rope having a tension of 31 newtons at an angle of 41º to the horizontal?
29.4 N
6.0 N
49.7 N
9.1 N
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Question 6
What is the normal force acting on a 3-kg mass which is being pushed at a constant velocity of 5 m/sec by a force of 31 newtons along a rigid handle that makes an angle of 41º to the horizontal?
9.1 N
6.0 N
52.8 N
49.7 N
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