5. In the simplified elevator system shown in the figure at right, a motor rotates a shaft wrapping or unwrapping a chain that raises or lowers the elevator car. The car's mass is 120x10kg and is designed to carry a maximum load of 9.5x10 kg. While in motion, a constant frictional force of 3.5X10" N acts on the card a What power must the motor deliver to raise the fully loaded car at a speed a of 2.5 m/s? 6. The above elevator system is modified by connecting a free-hanging 5.0 10-18 counterweight to the chain that passes over the shaft of the motor, as shown below. What power must the motor now deliver to raise the fully loaded car at a speed of 2.5 m/s?
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