A 900N crate slides 15m down a ramp that makes an angle of 35 degrees with the horizontal.
Homework Answers
that means all graviational energy goes to thermal energy
so thermal = m g h = 900*12*sin(40 degrees)=6942 J
as it slides at constant speed, so frictional force must be equal to mgsin35
so, F= 900*sin40=578.51 N
so thermal energy created =F*12 =6942.11 J = 6.94 kJ
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