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 3 m/sec
2
?
6 x 10
-1
nts
0 nts
8 x 10
0
nts
1.5 x 10
1
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 6 newtons towards the right experiences an acceleration of 0.2 m/sec
2
?
6 x 10
0
nts
1 x 10
0
nts
2.5 x 10
1
nts
5 x 10
0
nts
omit
Question 3
A 5-kg mass experiences two vertical forces: 45.8 newtons pulling upward and 49 newtons pulling downward. What acceleration does the 5-kg mass undergo?
3.2 m/sec
2
1.8 m/sec
2
-0.6 m/sec
2
19.0 m/sec
2
omit
Question 4
A 5-kg mass is being pulled towards the right with a rope that has a tension of 42 newtons at an angle of 38 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
6.6 m/sec
2
1.4 m/sec
2
8.4 m/sec
2
5.2 m/sec
2
omit
Question 5
A 12-gram bullet travelling at 40 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 38 centimeters, what average resistive force did the tree exert upon it?
-1.26 x 10
0
nts
-2.53 x 10
2
nts
-2.53 x 10
1
nts
-4.8 x 10
-1
nts
Copyright © 1997-2017
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton