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Homework Statement
Across a horizontal floor,a ##102 kg## block is pulled at a constant speed of ##5.5\frac {m} {s}## by an applied force ##125N## directed ##38^°## above the horizontal.Calculate the rate at which the force does work on the block.
Homework Equations
##W=ΔE_k##
##E_k=\frac 1 2 mv^2##
The Attempt at a Solution
I didnt understand the question.Whats does the Calculate the rate at which the force does work on the block means.Net work must be zero cause object moves in constant speed.So there must be a fricition maybe ?
Thanks