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Q. A sled slides along a horizontal surface for which the coefficient of kinetic friction is 0.25. Its velocity at point A is 8.0;{rm m}/{rm s} and at point B is 5.0;{rm m}/{rm s} Use the impulse-momentum theorem to find how long the sled takes to travel from A to B.

Q. On a cool morning, when the temperature is 14.0 ^circC, you measure the pressure in your car tires to be 20.0 psi. After driving 40.0 mi on the freeway, the temperature of your tires is 50.0 ^circC.

What pressure will your tire gauge now show?

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