A 900 kg car is going 20 ms along a level road how large a
A 900 kg car is going 20 m/s along a level road. How large a constant retarding force is required to stop it in a distance of 30 m? Perform the calculations for a (a) smooth road and (b) road with coefficient of rolling friction of 0.03.
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when a 58-g tennis ball is served it accelerates from rest to aspeed of 39 ms the impact with theracket gives the ball
a 900 kg car is going 20 ms along a level road how large a constant retarding force is required to stop it in a
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an ultraviolet lamp emits light of wavelength 400nm at the rate of400w an infrared lamp emits light of wavelength 700nm
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