- #1
princesspriya
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Homework Statement
a student wearing a frictionless in-line skates on a horizontal surface is pushed by a friend with a constant force of 45N. How far must the student be pushed, starting from rest, so that her final kinetic energy is 352J?
Homework Equations
The Attempt at a Solution
KE=1/2MV^2
352=1/2*(45/9.81)*V^2
Vf=12.39 and Vi=0 since it starts from rest
Wnet=1/2MVf^2-1/2MVi^2
1/2*(45/9.81)*12.39^2=352.31
Wnet=FnetDCosX
352.31=45dcos0
d=7.83m
I just wanted to know if that was a correct way of solving it or did i make a mistake somewhere?
thx for the help.