Homework Help: physics

Posted by lindsey on Thursday, January 26, 2012 at 10:51pm.

A 0.36 kg soccer ball approaches a player
horizontally with a velocity of 18 m/s to the
north. The player strikes the ball and causes
it to move in the opposite direction with a
velocity of 21 m/s.
What impulse was delivered to the ball by
the player?
Answer in units of kg · m/s

physics - drwls, Thursday, January 26, 2012 at 11:31pm
The impulse equals the momentum change. Note that the final momentum is opposite to the initial momentum.

0.36*[21 -(-18)] = _____ kg m/s

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