Question: As a shot put competitor, Sam throws an 8 kg ball straight upwards, giving it a constant upward acceleration of 35 m/s2 over 70.0 cm.

As a shot put competitor, Sam throws an 8 kg ball straight upwards, giving it a constant upward acceleration of 35 m/s2 over 70.0 cm. He releases the ball and it leaves his hands 2.20 m above the ground. (Note: Ignore air resistance. Let y = 0 at ground level.) (a) Whatisthespeedoftheballwhenitisjustreleased? (b) Whatistheaccelerationoftheballafteritisreleased? (c) Howhighabovethegrounddoestheballgo? (d) HowmuchtimedoesSamhavetogetoutofthewayoftheball(afteritsrelease)beforeitreturnstothe height of the top of his head which is 1.70 m above the ground? (e) Whatisthespeedoftheballjustasithitstheground? Make a sketch of the four steps described by the questions - release, maximum height, time after release to pass by his head, and speed hitting the ground. For each of these steps, write a couple sentences describing what you know, what you need to find, and your choice the constant acceleration equation

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a To find the speed of the ball when it is just released we can use the equation of motion for an object undergoing constant acceleration vf vi at Whe... View full answer

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