- #1
maxalador
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Homework Statement
a rope is used to pull a 3.57kg block at constant speed a distance 4.06m along a horizontal floor. the force on the block from the rope is 7.68 N and is directed 15 degrees above the horizontal.
a) calculate the work done by the ropes force
b) calculate the increase in thermal energy of the block-floor system
c) calculate the coefficient of kinetic friction between the block and floor.
Homework Equations
W=FDcos(theta)
The Attempt at a Solution
I solved for A by W=7.68*4.06*cos(5)and got A=30.1 but i am not sure what to do when solving for the thermal energy. For part C i know i need to calculate the Fn and am not sure how to find total friction force to solve for the coefficient.