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 2-kg mass if it is accelerating at a rate of 3 m/sec
^{2}
?
5 x 10
^{0}
nts
6 x 10
^{0}
nts
0 nts
1.5 x 10
^{0}
nts
omit
Question 2
What is the magnitude of the frictional force present if a 2-kg mass being pulled by a horizontal force of 7 newtons towards the right experiences an acceleration of 2.5 m/sec
^{2}
?
1.4 x 10
^{0}
nts
2 x 10
^{0}
nts
5 x 10
^{0}
nts
8 x 10
^{-1}
nts
omit
Question 3
A 2-kg mass experiences two vertical forces: 44.4 newtons pulling upward and 19.6 newtons pulling downward. What acceleration does the 2-kg mass undergo?
12.4 m/sec
^{2}
24.8 m/sec
^{2}
26.8 m/sec
^{2}
32.0 m/sec
^{2}
omit
Question 4
A 2-kg mass is being pulled towards the right with a rope that has a tension of 49 newtons at an angle of 27 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
11.1 m/sec
^{2}
21.8 m/sec
^{2}
10.7 m/sec
^{2}
24.5 m/sec
^{2}
omit
Question 5
A 14-gram bullet travelling at 50 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 27 centimeters, what average resistive force did the tree exert upon it?
-2.59 x 10
^{0}
nts
-7 x 10
^{-1}
nts
-6.48 x 10
^{1}
nts
-6.48 x 10
^{2}
nts
Copyright © 1997-2017
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton