72.2 cos34.8* 24.6 m = ___ J
That is the work done no matter what the friction force is.
Friction determines how much of that work goes into heat and how much goes into kinetic energy.
i have noo idea how to do this, please hellppppp
A 15.6 kg block is dragged over a rough, hor-
izontal surface by a constant force of 72.2 N
acting at an angle of angle 34.8� above the
horizontal. The block is displaced 24.6 m and
the coefficient of kinetic friction is 0.234.
Find the work done by the 72.2 N force.
The acceleration of gravity is 9.8 m/s2 .
Answer in units of J.
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