—— USE IMPULSE-MOMENTUM THEO-
REM FOR THIS QUESTION. If the ball
starts with a positive velocity and ends up
going in the opposite direction, shouldn’t the
sign be negative? ——
A 0.48 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 25 m/s.
What impulse was delivered to the ball by
the player?
Answer in units of kg · m/s
004 10.0
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