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}
?
0 nts
6 x 10
^{0}
nts
1.5 x 10
^{0}
nts
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 10 newtons towards the right experiences an acceleration of 4 m/sec
^{2}
?
8 x 10
^{0}
nts
1.25 x 10
^{0}
nts
5 x 10
^{-1}
nts
2 x 10
^{0}
nts
omit
Question 3
A 2-kg mass experiences two vertical forces: 66.2 newtons pulling upward and 19.6 newtons pulling downward. What acceleration does the 2-kg mass undergo?
48.6 m/sec
^{2}
23.3 m/sec
^{2}
42.9 m/sec
^{2}
46.6 m/sec
^{2}
omit
Question 4
A 2-kg mass is being pulled towards the right with a rope that has a tension of 70 newtons at an angle of 27 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
35.0 m/sec
^{2}
15.3 m/sec
^{2}
15.9 m/sec
^{2}
31.2 m/sec
^{2}
omit
Question 5
A 20-gram bullet travelling at 80 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 27 centimeters, what average resistive force did the tree exert upon it?
-2.37 x 10
^{2}
nts
-1.6 x 10
^{0}
nts
-2.37 x 10
^{3}
nts
-5.93 x 10
^{0}
nts
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