b) If the shot-put has a mass of 20 kg and is launched at an initial velocity of 15m/s at an angle of 42°, how long will it take for the shot-put to return to the same vertical height as it started at? Hint: what is the displacement in the y-dimension? c) How long does it take for the shot-put to reach its maximum height? d) What is the velocity of the shot-put at the maximum height along the trajectory?

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