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Slide and Velocity

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- A 71kg skater is sliding at a speed of 2.1m/s. He locks arms with his female partner, who is 52kg. If the coefficient of friction on the ice is .052, how far will the pair slide?

- Neptune is 4.50 x 10^ 9km away from the Sun. If the earth is 1.50 x 10^8km away from the sun, what is Neptune's period away from the Sun in earth years?

- A toy car drives off a diving board at a speed of 2.2m/s. The diving board is 1.2m of height from the ground. What is the final velocity of the car?

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4) A 71kg skater is sliding at a speed of 2.1m/s. He locks arms with his female partner, who is 52kg. If the coefficient of friction on the ice is .052, how far will the pair slide?
According to work-energy theorem, the net work done is equal to the change of kinetic energy.
The final velocity is 0. then

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