# Starting from rest, a 5.00 - kg block slides 2.50 m downa rough 30.0° incline. The coefficient of kinetic frictionbetween the block and the incline is μk = 0.436. Determine(a) the work done by the force of gravity, (b) the work done bythe friction force between block and incline, and (c) the workdone by the normal force. (d) Qualitatively, how would theanswers change if a shorter ramp at a steeper angle were usedto span the same vertical height?

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Starting from rest, a 5.00 - kg block slides 2.50 m down
a rough 30.0° incline. The coefficient of kinetic friction
between the block and the incline is μk = 0.436. Determine
(a) the work done by the force of gravity, (b) the work done by
the friction force between block and incline, and (c) the work
done by the normal force. (d) Qualitatively, how would the
answers change if a shorter ramp at a steeper angle were used
to span the same vertical height?

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Step 1

a)

the work done by the force of gravity is

Step 2

substitute the given values in the above equation to calculate W

Step 3

b)

the expression for the work done b... help_outlineImage TranscriptioncloseW' =(µ,R)d Here Ris thenormal rection force R = mg cos e W' = (4,mg cos e)d fullscreen

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