Physics, 04.02.2020 23:44 reggienald3095
A50 kg projectile is fired at an angle of 30 degrees above the horizontal with an initial speed of 1.2 x 10^2 m/s from the top of a cliff 142 m above level ground, where the ground is taken to be y=0. a) what is the initial total mechanical energy of the projectile? b) suppose the projectile is traveling 85 m/s at its max height of y=427 m. how much work has been done on the projectile by air friction? c) what is the speed of the projectile immediately before it hits the ground if air friction does one and a half times as much work on the projectile when it is go down as when go up?
Answers: 2
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A50 kg projectile is fired at an angle of 30 degrees above the horizontal with an initial speed of 1...
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