- #1
alyssad
Homework Statement
In the question, a person is pulling a 156 kg sled up a hill. A 620 N force is used to pull the sled up the hill that has an angle of 29° with the horizontal. The sled is pulled a distance of 26 m, and the kinetic friction coefficient is 0.0622. The system has been defined as the sled and the surface of the ground.
I need to calculate the amount of work the person is using to pull the sled, and I need to calculate the change in the thermal energy experienced by the system.
Homework Equations
W = F*d*cos(Θ)
ΔEth = FkΔr
The Attempt at a Solution
I've been trying to do W = μkmgΔr*cos(Θ), but I don't think I'm doing it correctly.
And I think I need to know the work to make finding the change in thermal energy easier.
Thank you!