A 1600 kg elevator accelerates u? Ward at 1.40 m/s^2 for 12.0 m, starting from r

Question

A 1600 kg elevator accelerates u? Ward at 1.40 m/s^2 for 12.0 m, starting from rest. You may want to review For help with math skills, you may want to review: Mathematical Expressions Involving Squares For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Pulling a box across the floor. How much work does gravity do on the elevator? Express your answer with the appropriate units. How much work does the tension in the elevator cable do on the elevator? Express your answer with the appropriate units. Use the work-kinetic energy theorem to find the kinetic energy of the elevator as it reaches 12.0 m. Express your answer with the appropriate units.

Explanation / Answer

use work energy theorem:
work done by gravity + work done by tension = kinetic energy
-1.88*10^5+ 2.15*10^5 = kinetic energy
kinetic energy = 2.7*10^4 J
Answer: 2.7*10^4 J

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