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
?
0 nts
3 x 10
1
nts
1.1 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 8 newtons towards the right experiences an acceleration of -2.4 m/sec
2
?
2.08 x 10
0
nts
6.67 x 10
-1
nts
2 x 10
1
nts
1.2 x 10
1
nts
omit
Question 3
A 5-kg mass experiences two vertical forces: 46.1 newtons pulling upward and 49 newtons pulling downward. What acceleration does the 5-kg mass undergo?
2.1 m/sec
2
2.9 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 56 newtons at an angle of 30 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
11.2 m/sec
2
5.6 m/sec
2
9.7 m/sec
2
4.1 m/sec
2
omit
Question 5
A 16-gram bullet travelling at 80 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 30 centimeters, what average resistive force did the tree exert upon it?
-1.71 x 10
3
nts
-1.71 x 10
2
nts
-1.28 x 10
0
nts
-4.27 x 10
0
nts
Copyright © 1997-2009
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton