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}
?
0 nts
5 x 10
^{0}
nts
1.5 x 10
^{0}
nts
6 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}
?
5 x 10
^{0}
nts
8 x 10
^{-1}
nts
1.4 x 10
^{0}
nts
2 x 10
^{0}
nts
omit
Question 3
A 2-kg mass experiences two vertical forces: 30 newtons pulling upward and 19.6 newtons pulling downward. What acceleration does the 2-kg mass undergo?
24.8 m/sec
^{2}
5.2 m/sec
^{2}
10.4 m/sec
^{2}
12.4 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 37 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
19.6 m/sec
^{2}
4.8 m/sec
^{2}
24.5 m/sec
^{2}
14.7 m/sec
^{2}
omit
Question 5
A 14-gram bullet travelling at 90 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 37 centimeters, what average resistive force did the tree exert upon it?
-3.41 x 10
^{0}
nts
-1.53 x 10
^{2}
nts
-1.26 x 10
^{0}
nts
-1.53 x 10
^{3}
nts
Copyright © 1997-2018
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton