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 5 m/sec
^{2}
?
2.5 x 10
^{0}
nts
0 nts
7 x 10
^{0}
nts
1 x 10
^{1}
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 9 newtons towards the right experiences an acceleration of 1.5 m/sec
^{2}
?
6 x 10
^{0}
nts
3 x 10
^{0}
nts
3 x 10
^{0}
nts
1.33 x 10
^{0}
nts
omit
Question 3
A 2-kg mass experiences two vertical forces: 70.1 newtons pulling upward and 19.6 newtons pulling downward. What acceleration does the 2-kg mass undergo?
44.8 m/sec
^{2}
50.5 m/sec
^{2}
25.2 m/sec
^{2}
52.5 m/sec
^{2}
omit
Question 4
A 2-kg mass is being pulled towards the right with a rope that has a tension of 63 newtons at an angle of 26 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
14.5 m/sec
^{2}
28.3 m/sec
^{2}
31.5 m/sec
^{2}
13.8 m/sec
^{2}
omit
Question 5
A 18-gram bullet travelling at 60 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 26 centimeters, what average resistive force did the tree exert upon it?
-1.08 x 10
^{0}
nts
-4.15 x 10
^{0}
nts
-1.25 x 10
^{3}
nts
-1.25 x 10
^{2}
nts
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