How Do You Calculate Work Done and Heat Energy Generated by Friction on a Ramp?

AI Thread Summary
To calculate the work done by the person pushing a 10.0 kg mass up a 7.60 m long ramp at a 20-degree angle with a force of 70.0 N, the work done is determined using the formula W = Fd, resulting in 500 J. The frictional force can be calculated using the coefficient of friction (μ = 0.170) and the normal force, which is influenced by the ramp's angle. The heat energy generated by friction is expected to be 150 J, but the calculations for this value are unclear to the poster. The discussion highlights the need for assistance in understanding the relationship between the forces involved and the resulting energy calculations. Clarifying these concepts is essential for solving the homework problem effectively.
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Homework Statement


A person pushes a 10.0 kg mass up a 7.60 m long, 20 degree ramp( mu=.170) with a horizontal force of 70.0N. Find the work done by the person and the heat energy generated by friction.
the answer for heat energy i canot get..its supposed to be 150J

Homework Equations


W=Fd
F=ma
P=W/t
v=vo+at


The Attempt at a Solution


[img=http://img80.imageshack.us/img80/4013/helprd8.th.jpg]
a)7.14x70 = 500J
Fx=70N
Fperp=70tan20 ?
Fparalell=70/cos20=74.5N ?
 
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please help both of my problems posted are due tommorow worht marks and I am so lost please !
 
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