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 4-kg mass if it is accelerating at a rate of 6 m/sec
^{2}
?
0 nts
1.5 x 10
^{0}
nts
2.4 x 10
^{1}
nts
1 x 10
^{1}
nts
omit
Question 2
What is the magnitude of the frictional force present if a 4-kg mass being pulled by a horizontal force of 6 newtons towards the right experiences an acceleration of -2.5 m/sec
^{2}
?
6 x 10
^{-1}
nts
1.6 x 10
^{0}
nts
1 x 10
^{1}
nts
1.6 x 10
^{1}
nts
omit
Question 3
A 4-kg mass experiences two vertical forces: 31.6 newtons pulling upward and 39.2 newtons pulling downward. What acceleration does the 4-kg mass undergo?
7.6 m/sec
^{2}
-3.6 m/sec
^{2}
17.7 m/sec
^{2}
-1.9 m/sec
^{2}
omit
Question 4
A 4-kg mass is being pulled towards the right with a rope that has a tension of 42 newtons at an angle of 42 degrees to the x-axis. If the surface is frictionless, what acceleration will the mass develop?
7.0 m/sec
^{2}
7.8 m/sec
^{2}
10.5 m/sec
^{2}
0.8 m/sec
^{2}
omit
Question 5
A 12-gram bullet travelling at 60 m/sec is fired into a tree. If the bullet is brought to a stop in a distance of 42 centimeters, what average resistive force did the tree exert upon it?
-1.71 x 10
^{0}
nts
-7.2 x 10
^{-1}
nts
-5.14 x 10
^{1}
nts
-5.14 x 10
^{2}
nts
PhysicsLAB
Copyright © 1997-2024
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton