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A 50 kg boy runs up a flight of stairs 12 m high in 6 seconds. What is his power output?
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Let's deconstruct this. Power is energy per second. How much energy is required to lift 50kg by 12m? How much power does it take to impart that energy in 6 seconds?
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Two particles, A and B, move with constant velocities and . Initially their position vectors are respectively. The relation between such that two particle, collide with each other
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