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July 28, 2014

Homework Help: physics

Posted by Anonymous on Friday, November 9, 2012 at 1:00am.

A 14.7 kg crate is pulled up a rough incline
with an initial speed of 1.5 m/s. The pulling
force is 124.0 N parallel to the incline, which
makes an angle of 11.0

with the horizontal.
The coefficient of kinetic friction is 0.31 and
the crate is pulled a distance of 7.2 m.
The acceleration of gravity is 9.81 m/s
2
.
a) Find the work done by Earth’s gravity
on the crate.
Answer in units of J

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