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 3 m/sec
2
?
9 x 10
0
nts
1 x 10
0
nts
0 nts
6 x 10
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 7 newtons towards the right experiences an acceleration of 1.33 m/sec
2
?
3.99 x 10
0
nts
2.26 x 10
0
nts
3 x 10
0
nts
1.75 x 10
0
nts
omit
Question 3
A 3-kg mass experiences two vertical forces: 68.5 newtons pulling upward and 29.4 newtons pulling downward. What acceleration does the 3-kg mass undergo?
42.1 m/sec
2
13.0 m/sec
2
39.1 m/sec
2
32.6 m/sec
2
omit
Question 4
A 3-kg mass is being pulled towards the right with a rope that has a tension of 49 newtons at an angle of 43 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
16.3 m/sec
2
11.9 m/sec
2
0.8 m/sec
2
11.1 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 43 centimeters, what average resistive force did the tree exert upon it?
-7.98 x 10
2
nts
-9.8 x 10
-1
nts
-7.98 x 10
1
nts
-2.28 x 10
0
nts
Copyright © 1997-2019
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton