physics problem?

Question

A box slides down a 26.2degree ramp with an
acceleration of 1.07 m/s/s.
The acceleration of gravity is 9.8 m/s/s.
Determine the coefficient of kinetic friction
between the box and the ramp.

Answer 1

F=m*a=m*g*sin(26.2)-
m*g*cos(26.2)*u

a=1.07=g*sin(26.2)-g*cos(26.2)*u

solve for u
u=0.37

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