Practice Problems
Net F = ma
Directions:
On this worksheet, positive horizontal directions are towards the right and positive vertical directions are upwards.
omit
Question 1
What is the net force acting on a 2-kg mass if it is accelerating at a rate of 3 m/sec
2
?
6 x 10
0
nts
0 nts
5 x 10
0
nts
1.5 x 10
0
nts
omit
Question 2
What is the magnitude of the frictional force present if a 2-kg mass being pulled by a horizontal force of 5 newtons towards the right experiences an acceleration of 1.5 m/sec
2
?
1.33 x 10
0
nts
2 x 10
0
nts
3 x 10
0
nts
1.67 x 10
0
nts
omit
Question 3
A 2-kg mass experiences two vertical forces: 49 newtons pulling upward and 19.6 newtons pulling downward. What acceleration does the 2-kg mass undergo?
29.4 m/sec
2
31.4 m/sec
2
14.7 m/sec
2
34.3 m/sec
2
omit
Question 4
A 2-kg mass is being pulled towards the right with a rope that has a tension of 35 newtons at an angle of 41 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
13.2 m/sec
2
11.5 m/sec
2
17.5 m/sec
2
1.7 m/sec
2
omit
Question 5
A 10-gram bullet travelling at 50 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 41 centimeters, what average resistive force did the tree exert upon it?
-3.05 x 10
2
nts
-1.22 x 10
0
nts
-3.05 x 10
1
nts
-5 x 10
-1
nts
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