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 6-kg mass if it is accelerating at a rate of 4 m/sec
2
?
2.4 x 10
1
nts
6.67 x 10
-1
nts
0 nts
1 x 10
1
nts
omit
Question 2
What is the magnitude of the frictional force present if a 6-kg mass being pulled by a horizontal force of 7 newtons towards the right experiences an acceleration of -0.83 m/sec
2
?
1.2 x 10
1
nts
4.98 x 10
0
nts
7.23 x 10
0
nts
1.41 x 10
0
nts
omit
Question 3
A 6-kg mass experiences two vertical forces: 54.6 newtons pulling upward and 58.8 newtons pulling downward. What acceleration does the 6-kg mass undergo?
1.8 m/sec
2
-0.7 m/sec
2
18.9 m/sec
2
4.2 m/sec
2
omit
Question 4
A 6-kg mass is being pulled towards the right with a rope that has a tension of 49 newtons at an angle of 44 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
8.2 m/sec
2
5.9 m/sec
2
5.7 m/sec
2
0.2 m/sec
2
omit
Question 5
A 14-gram bullet travelling at 70 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 44 centimeters, what average resistive force did the tree exert upon it?
-2.23 x 10
0
nts
-9.8 x 10
-1
nts
-7.8 x 10
2
nts
-7.8 x 10
1
nts
Copyright © 1997-2019
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton