Question

please answer #4and 5

3. A ball is thrown up vertically and reaches the top of it's path and falls downward again. What is the acceleration of the ball at the very top of it's path? Justify your answer. 4 A ball is thrown upward without air resistance (freely falling) and returns to the same height. How does the time up compare with the down? Justify your answer 5. A ball is thrown upward with air resistance (falling body) and returns to the same height. How does the time up compare with the time down? Justify your answer

Answer 1

Sotn: Let u be inhal 3pecd bau. et h be haght ball if Covet s Lel fako \, hme cohıle moving cb and hing moximum .hayht .. and h ut,-g4,2 u2 29 Le 2 be hmu it laku b da Same hyht h. then, u2 29 Hew, ,=2 So, it coill aku Jame hme Let Fbe dort of ldahan oaistanu. For upwer mohon, F acts doconawasd. Let a be "cferdahon. mgF-ma Similaly, dor doton coard mo ion hmg-F ma2 an9-Flm) b up nove T aoill take lus fime to axhah han tmove down.