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 5 m/sec
^{2}
?
4 x 10
^{1}
nts
0 nts
6.25 x 10
^{-1}
nts
1.3 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 6 newtons towards the right experiences an acceleration of -2.25 m/sec
^{2}
?
1.8 x 10
^{1}
nts
2.4 x 10
^{1}
nts
3.56 x 10
^{0}
nts
3.33 x 10
^{-1}
nts
omit
Question 3
A 8-kg mass experiences two vertical forces: 16.6 newtons pulling upward and 78.4 newtons pulling downward. What acceleration does the 8-kg mass undergo?
61.8 m/sec
^{2}
11.9 m/sec
^{2}
-7.7 m/sec
^{2}
-53.8 m/sec
^{2}
omit
Question 4
A 8-kg mass is being pulled towards the right with a rope that has a tension of 42 newtons at an angle of 36 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
3.1 m/sec
^{2}
5.3 m/sec
^{2}
1.2 m/sec
^{2}
4.2 m/sec
^{2}
omit
Question 5
A 12-gram bullet travelling at 60 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 36 centimeters, what average resistive force did the tree exert upon it?
-7.2 x 10
^{-1}
nts
-6 x 10
^{2}
nts
-6 x 10
^{1}
nts
-2 x 10
^{0}
nts
Copyright © 1997-2017
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton