You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between your feet and the ice. A friend throws you a ball of mass 0.400 kg that is traveling horizontally at 10.8 m/s. Your mass is 70.4 kg.(adsbygoogle = window.adsbygoogle || []).push({});

this is my first answer

If you catch the ball, with what speed do you and the ball move afterwards?

6.1 cm/sCorrect

my answersdisplay math

Part B

If the ball hits you and bounces off your chest, so afterwards it is moving horizontally at 7.90 m/s in the opposite direction, what is your speed after the collision?

cm/s

with the second part, i calculated the first momentum before the collision then the one for after. i subtracted the after from before and devided my the mass of the boy and i got 1.64 cm/s. is this wrong? the velocity of the boy before the collison is zero becasue he's at rest.

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# Homework Help: Elastic collision?

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