Physics
posted by Jan .
Find the magnitude of the impulse delivered to a soccer ball when a player kicks it with a force of 1500 . Assume that the player's foot is in contact with the ball for 5.50×10−3
p= __kg*m/s

You need to include the units of force and seconds. I assume they are Newtons (N) and seconds, but you just can't leave out things like that in physics.
Anyway, force x time equals impulse.
Note that 1 N*s is the same as 1 kg*m/s, since 1 N = 1 kg m/s^2
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