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54 is compressed 40 cm and used to launch a 100 kg physics student.

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The spring shown in Figure P11.54 is compressed 40 cm and used to launch a 100 kg physics student. The track is frictionless until it starts up the incline. The student's coefficient of kinetic friction on the 30° incline is 0.15.
(a) What is the student's speed just after losing contact with the spring?
(b) How far up the incline does the student go?

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