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 5 m/sec
^{2}
?
8.33 x 10
^{-1}
nts
3 x 10
^{1}
nts
1.1 x 10
^{1}
nts
0 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 10 newtons towards the right experiences an acceleration of -1.33 m/sec
^{2}
?
7.98 x 10
^{0}
nts
4.51 x 10
^{0}
nts
1.25 x 10
^{0}
nts
1.8 x 10
^{1}
nts
omit
Question 3
A 6-kg mass experiences two vertical forces: 46.7 newtons pulling upward and 58.8 newtons pulling downward. What acceleration does the 6-kg mass undergo?
-2.0 m/sec
^{2}
12.1 m/sec
^{2}
17.6 m/sec
^{2}
-6.1 m/sec
^{2}
omit
Question 4
A 6-kg mass is being pulled towards the right with a rope that has a tension of 70 newtons at an angle of 43 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
11.7 m/sec
^{2}
0.6 m/sec
^{2}
8.0 m/sec
^{2}
8.5 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 43 centimeters, what average resistive force did the tree exert upon it?
-1.49 x 10
^{2}
nts
-3.72 x 10
^{0}
nts
-1.6 x 10
^{0}
nts
-1.49 x 10
^{3}
nts
Copyright © 1997-2018
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton