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Question

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The spring shown in the figure is compressed44 cm and used to launch a 100 kg physics student. The track is frictionless until it starts up the incline. The student'scoefficient of kinetic friction on the 30? incline is 0.11.

The spring shown in the figure is compressed 44 cm and used to launch a 100 kg physics student. The track is frictionless until it starts up the incline. The student'scoefficient of kinetic friction on the 30? incline is 0.11 . What is the student's speed just after losing contact with the spring? How far up the incline does the student go?

Explanation / Answer

part a:

kx^2=mv^2

=>v=12.44 m/s

part b:

d=(mgh+kx^2/2)/(mg(cos30 + 0.11sin30)=19.43 m

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