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Q1. Two spheres, fastened to "pucks" riding on a frictionless air track, are charged with +2 × 10-8 C, and +6 × 10-8 C, correspondingly. Both objects have the same mass. As they repel.

Q2. A 17.50kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 86.5N and is directed at an angle of 30.0° above the horizontal. Find out the coefficient of kinetic friction.

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Category:- Physics
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