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A 3.0 kg mass is attached to a vertical spring hanging from the ceiling. The spring and mass are stationary. The spring constant for the spring is 250 N/m. The mass is now pulled 1.50m downward where it touches the floor.
1. What is the gravitational potential energy of the system?
2. The mass is now released from rest. What is the kinetic energy of the system when the mass has traveled 1.50m upward?
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Starting from rest, a 91-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 800 N, How far did he slide down the pole
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