Aplayer bounces a 0.43-kg soccer ball off her head, changing
the velocity of the ball from
Vi = (8.8 m/s)x + (-2.3 m/s)y
Vf = (5.2 m/s)xN + (3.7 m/s)y[/B]
. If the ball is in contact with the
player’s head for 6.7 ms, what are (a) the direction and (b) the
magnitude of the impulse delivered to the ball?
Will I be wrong if I use just change in velocities(ie excluding) in x-comp and y-comp to calculate direction of the impulse.
I did calculation which gave me theta of -59.03, and when using coordinates the theta falls in second quadrant.
1. delta P(x comp)= Pf(x)-Pi(x)= -1.548
2. delta P(y comp)=Pf(y)-Pi(y)=2.58
The Attempt at a Solution
Using the solutions I calculated magnitude of impulse as 3.03 kg.m/s