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 3-kg mass if it is accelerating at a rate of 6 m/sec
2
?
2 x 10
0
nts
9 x 10
0
nts
1.8 x 10
1
nts
0 nts
omit
Question 2
What is the magnitude of the frictional force present if a 3-kg mass being pulled by a horizontal force of 6 newtons towards the right experiences an acceleration of -2 m/sec
2
?
6 x 10
0
nts
1.2 x 10
1
nts
1 x 10
0
nts
1.5 x 10
0
nts
omit
Question 3
A 3-kg mass experiences two vertical forces: 57.1 newtons pulling upward and 29.4 newtons pulling downward. What acceleration does the 3-kg mass undergo?
27.7 m/sec
2
28.8 m/sec
2
30.7 m/sec
2
9.2 m/sec
2
omit
Question 4
A 3-kg mass is being pulled towards the right with a rope that has a tension of 42 newtons at an angle of 35 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
14.0 m/sec
2
3.4 m/sec
2
11.5 m/sec
2
8.0 m/sec
2
omit
Question 5
A 12-gram bullet travelling at 80 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 35 centimeters, what average resistive force did the tree exert upon it?
-2.74 x 10
0
nts
-1.1 x 10
2
nts
-1.1 x 10
3
nts
-9.6 x 10
-1
nts
Copyright © 1997-2018
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton