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 8-kg mass if it is accelerating at a rate of 5 m/sec
2
?
4 x 10
1
nts
1.3 x 10
1
nts
0 nts
6.25 x 10
-1
nts
omit
Question 2
What is the magnitude of the frictional force present if a 8-kg mass being pulled by a horizontal force of 10 newtons towards the right experiences an acceleration of -1.75 m/sec
2
?
1.4 x 10
1
nts
7.14 x 10
-1
nts
4.57 x 10
0
nts
2.4 x 10
1
nts
omit
Question 3
A 8-kg mass experiences two vertical forces: 44.3 newtons pulling upward and 78.4 newtons pulling downward. What acceleration does the 8-kg mass undergo?
-26.1 m/sec
2
34.1 m/sec
2
-4.3 m/sec
2
15.3 m/sec
2
omit
Question 4
A 8-kg mass is being pulled towards the right with a rope that has a tension of 70 newtons at an angle of 25 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
8.8 m/sec
2
4.2 m/sec
2
3.7 m/sec
2
7.9 m/sec
2
omit
Question 5
A 20-gram bullet travelling at 80 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 25 centimeters, what average resistive force did the tree exert upon it?
-2.56 x 10
2
nts
-2.56 x 10
3
nts
-6.4 x 10
0
nts
-1.6 x 10
0
nts
Copyright © 1997-2018
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton