| a. Use path ac to raise the roller up an inclined plane that
makes an angle of about 30 degrees with the Earth's surface (see diagram
above). Use a spring balance to measure the force you are exerting , and
calculate the work you performed using the definition of work.
b. Raise the roller directly to the same height as the top of the inclined
plane along path ad and then move the roller horizontally from point
d
to point c. Again, use the definition of work to calculate
the work done in raising the roller along path adc.
c. How does the work measured in a. compare to that measured in b.? Is this what you expected? Why or why not? Hint: Is the force field conservative? |
Work Done on a Charge Traveling in a Uniform Electric Field
| a. A charge q travels a distance d from point
A
to point B; the path is parallel to a uniform electric field of
magnitude E. What is the work done by the field on the charge? How
does the form of this equation compare to the work done on a mass m
traveling
a distance d in then almost uniform gravitational field near the
surface of the Earth?
b. The charge q travels a distance d from point A to point B in a uniform electric field of magnitude E, but this time the path is perpendicular to the field lines. What is the work done by the field on the charge?
c. The charge q travels a distance d from point
A
to pint B in a uniform electric field of magnitude
E. The
path lies at a 45o angle to the field lines What is the work
done by the field on the charge?
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