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 5-kg mass if it is accelerating at a rate of 6 m/sec
2
?
1.1 x 10
1
nts
0 nts
3 x 10
1
nts
1.2 x 10
0
nts
omit
Question 2
What is the magnitude of the frictional force present if a 5-kg mass being pulled by a horizontal force of 7 newtons towards the right experiences an acceleration of -2.6 m/sec
2
?
5.38 x 10
-1
nts
1.92 x 10
0
nts
1.3 x 10
1
nts
2 x 10
1
nts
omit
Question 3
A 5-kg mass experiences two vertical forces: 31.7 newtons pulling upward and 49 newtons pulling downward. What acceleration does the 5-kg mass undergo?
-3.5 m/sec
2
-12.3 m/sec
2
17.3 m/sec
2
16.1 m/sec
2
omit
Question 4
A 5-kg mass is being pulled towards the right with a rope that has a tension of 49 newtons at an angle of 39 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
6.2 m/sec
2
1.4 m/sec
2
9.8 m/sec
2
7.6 m/sec
2
omit
Question 5
A 14-gram bullet travelling at 60 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 39 centimeters, what average resistive force did the tree exert upon it?
-2.15 x 10
0
nts
-8.4 x 10
-1
nts
-6.46 x 10
2
nts
-6.46 x 10
1
nts
Copyright © 1997-2019
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton