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PHYS 2211 ABCDE Spring 08
MP43: Work and Force
Due at 11:59pm on Sunday, March 30, 2008
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Work from a Constant Force
Learning Goal:
To understand how to compute the work done by a constant force acting on a particle that moves in a straight
line.
In this problem, you will calculate the work done by a constant force. A force is considered constant if
is independent of
. This is the most frequently encountered situation in elementary Newtonian mechanics.
Part A
Consider a particle moving in a straight line from initial point B to final point A, acted upon by a constant force
. The force
(think of it as a field, having a magnitude and direction at every
position
) is indicated by a series of identical vectors pointing to
the left, parallel to the horizontal axis. The vectors are all
identical only because the force is constant along the path. The
magnitude of the force is
, and the displacement vector from
point B to point A is
(of magnitude
, making and angle
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 Spring '08
 UZER
 Force, Work, constant force, 103.83%

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