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Q1. A small metal sphere, carrying a net charge of = -2.70, is held in a stationary position by insulating supports. A second small metal sphere, with a net charge of = -7.80 and mass 1.60 , is projected toward . When the two spheres are 0.700 apart, is moving toward with speed 21.0 . Suppose that the two spheres can be treated as point charges. You can overlook the force of gravity.
Q2. An asteroid is discovered heading straight toward Earth at 12km/s . An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 mins , after that the asteroid is moving at 30 degrees to its original path at the speed of 18 km/h/ Find its average acceleration.
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