The cable of a 1950-kg elevator has broken, and the elevator

QUESTION

The cable of a 1950-kg elevator has broken, and the elevator is moving downward at a steady speed of 1.3 m/s. A safety braking system that works on friction prevents the downward speed from increasing.(a) At what rate is the braking system converting mechanical energy to thermal energy?________________kW(b) While the elevator is moving downward at 1.3 m/s, the braking system fails and the elevator is in free-fall for a distance of 5.3 m before hitting the top of a large safety spring with force constant of 1.50 104 N/m. After the elevator hits the top of the spring, find the distance d that the spring is compressed before the elevator is brought to rest.____________________m

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