Question

A ball moving with momentum with 5 kg m/s strikes against a wall at 45 and is reflected at the same angle. Calculate the impulse

Answer 1

impulse= change in momentum

Here the change is in vertical direction and as such the direction of impulse is also vertical.
Magnitude of impulse is,
$J=\delta P$
$J= 2 P sin(45)$
$J= 5.253$