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 6 m/sec
^{2}
?
7.5 x 10
^{-1}
nts
0 nts
4.8 x 10
^{1}
nts
1.4 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 9 newtons towards the right experiences an acceleration of -2.88 m/sec
^{2}
?
3.2 x 10
^{1}
nts
2.3 x 10
^{1}
nts
2.78 x 10
^{0}
nts
3.91 x 10
^{-1}
nts
omit
Question 3
A 8-kg mass experiences two vertical forces: 73.8 newtons pulling upward and 78.4 newtons pulling downward. What acceleration does the 8-kg mass undergo?
19.0 m/sec
^{2}
-0.6 m/sec
^{2}
3.4 m/sec
^{2}
4.6 m/sec
^{2}
omit
Question 4
A 8-kg mass is being pulled towards the right with a rope that has a tension of 63 newtons at an angle of 35 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
6.5 m/sec
^{2}
7.9 m/sec
^{2}
1.9 m/sec
^{2}
4.5 m/sec
^{2}
omit
Question 5
A 18-gram bullet travelling at 80 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 35 centimeters, what average resistive force did the tree exert upon it?
-1.44 x 10
^{0}
nts
-1.65 x 10
^{2}
nts
-4.11 x 10
^{0}
nts
-1.65 x 10
^{3}
nts
Copyright © 1997-2017
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton