How much work has been done on projectile by air friction

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Reference no: EM13647343

A 50.0-kg projectile is fired at angle of 30.0 degrees above the horizontal with an initial speed of 120 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 85.0 m/s at its maximum height of y = 427m. How much work has been done on the projectile by air friction?

Reference no: EM13647343

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