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Homework Statement
A spring with constant 72500.0 N/m is compressed 54.6 cm and used to launch a 109.0 kg physics student. The student starts decending down a 13.4 m high track that is frictionless until the student starts up the incline again. The student's coefficient of kinetic friction on the 28.5° incline is 0.129. What is the student's speed just after losing contact with the spring?
Homework Equations
e=0.5mv^{2}
eg=mgh
spring = 0.5kx^{2}
The Attempt at a Solution
alright for this question i equated the mgh+0.5mv^{2} = 0.5kx^{2}
and solved for v .... is this the wrong thinking for this question pls. help
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