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 8-kg mass if it is accelerating at a rate of 3 m/sec
^{2}
?
1.1 x 10
^{1}
nts
2.4 x 10
^{1}
nts
0 nts
3.75 x 10
^{-1}
nts
omit
Question 2
What is the magnitude of the frictional force present if a 8-kg mass being pulled by a horizontal force of 11 newtons towards the right experiences an acceleration of 0.38 m/sec
^{2}
?
3.04 x 10
^{0}
nts
3.62 x 10
^{0}
nts
2.11 x 10
^{1}
nts
8 x 10
^{0}
nts
omit
Question 3
A 8-kg mass experiences two vertical forces: 75.4 newtons pulling upward and 78.4 newtons pulling downward. What acceleration does the 8-kg mass undergo?
-0.4 m/sec
^{2}
3.0 m/sec
^{2}
5.0 m/sec
^{2}
19.2 m/sec
^{2}
omit
Question 4
A 8-kg mass is being pulled towards the right with a rope that has a tension of 77 newtons at an angle of 37 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
5.8 m/sec
^{2}
9.6 m/sec
^{2}
1.9 m/sec
^{2}
7.7 m/sec
^{2}
omit
Question 5
A 22-gram bullet travelling at 70 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 37 centimeters, what average resistive force did the tree exert upon it?
-1.46 x 10
^{2}
nts
-1.46 x 10
^{3}
nts
-4.16 x 10
^{0}
nts
-1.54 x 10
^{0}
nts
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