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 9-kg mass if it is accelerating at a rate of 4 m/sec
^{2}
?
4.44 x 10
^{-1}
nts
3.6 x 10
^{1}
nts
1.3 x 10
^{1}
nts
0 nts
omit
Question 2
What is the magnitude of the frictional force present if a 9-kg mass being pulled by a horizontal force of 6 newtons towards the right experiences an acceleration of -1.33 m/sec
^{2}
?
5.01 x 10
^{-1}
nts
1.8 x 10
^{1}
nts
6.77 x 10
^{0}
nts
1.2 x 10
^{1}
nts
omit
Question 3
A 9-kg mass experiences two vertical forces: 45.3 newtons pulling upward and 88.2 newtons pulling downward. What acceleration does the 9-kg mass undergo?
-4.8 m/sec
^{2}
42.9 m/sec
^{2}
14.8 m/sec
^{2}
-33.9 m/sec
^{2}
omit
Question 4
A 9-kg mass is being pulled towards the right with a rope that has a tension of 42 newtons at an angle of 30 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
2.3 m/sec
^{2}
4.7 m/sec
^{2}
4.0 m/sec
^{2}
1.7 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 30 centimeters, what average resistive force did the tree exert upon it?
-2.4 x 10
^{0}
nts
-7.2 x 10
^{-1}
nts
-7.2 x 10
^{1}
nts
-7.2 x 10
^{2}
nts
Copyright © 1997-2017
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton