A 9.05 kg projectile is fired vertically upward. air drag, Ask an Expert

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Q1. A 9.05 kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 77.5 kJ throughout the projectile's ascent. How much higher would the projectile have gone were air drag negligible?

Q2. The leg and cast in the weigh 369 N (w1). Find the weight w2 and the angle alpha needed so that no force is exerted on the hip joint by the leg plus cast.

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Category:- Physics
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