- #1
lauriecherie
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Homework Statement
A 100 kg block is pulled at a constant speed of 3 m/s across a horizontal floor by an applied foce of 145 N directed 37 degrees above the horizontal. What is the rate at which the force does work on the block? _____ W
Homework Equations
work = force (dot product) displacement
work = .5m * v^2 (final) - .5m *v^2 (initial)
The Attempt at a Solution
i used the second equation and plugged in my mass as 100kg and my final velocity as 3. so i got .5(100)(3^2) = 450 W. That seems like an awful lot to me ?