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 6-kg mass if it is accelerating at a rate of 5 m/sec
^{2}
?
1.1 x 10
^{1}
nts
0 nts
8.33 x 10
^{-1}
nts
3 x 10
^{1}
nts
omit
Question 2
What is the magnitude of the frictional force present if a 6-kg mass being pulled by a horizontal force of 8 newtons towards the right experiences an acceleration of -1.67 m/sec
^{2}
?
1.8 x 10
^{1}
nts
3.59 x 10
^{0}
nts
7.98 x 10
^{-1}
nts
1 x 10
^{1}
nts
omit
Question 3
A 6-kg mass experiences two vertical forces: 15.3 newtons pulling upward and 58.8 newtons pulling downward. What acceleration does the 6-kg mass undergo?
-7.3 m/sec
^{2}
43.5 m/sec
^{2}
-37.5 m/sec
^{2}
12.4 m/sec
^{2}
omit
Question 4
A 6-kg mass is being pulled towards the right with a rope that has a tension of 56 newtons at an angle of 42 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
0.7 m/sec
^{2}
6.2 m/sec
^{2}
6.9 m/sec
^{2}
9.3 m/sec
^{2}
omit
Question 5
A 16-gram bullet travelling at 80 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 42 centimeters, what average resistive force did the tree exert upon it?
-1.28 x 10
^{0}
nts
-3.05 x 10
^{0}
nts
-1.22 x 10
^{2}
nts
-1.22 x 10
^{3}
nts
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