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A 20 kg mass is connected by a 100 meter cable to a 1000 kg car that is at rest, with its brakes off, about 100 meters from the edge of the cliff. The weight is then hung over a pulley at the edge of the cliff and released.
a. What is the acceleration of the car toward the cliff?
b. How long will it take the car to reach the cliff?
c. How fast will the car be traveling the moment it goes over the cliff?

Sagot :

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