Response:
Clarification:
Impulse is equal to change in momentum
mv - mu, where v and u represent the final and initial velocities during the surface impact
For the downward motion of the baseball
v² = u² + 2gh₁
= 2 x 9.8 x 2.25
v = 6.64 m / s
This becomes the initial velocity upon impact.
For the upward movement
v² = u² - 2gh₂
u² = 2 x 9.8 x 1.38
u = 5.2 m / s
This becomes the final velocity post-impact
change in momentum is
m ( final velocity - initial velocity )
.49 ( 5.2 - 6.64 )
=.7056 N.s.
Impulse exerted by the floor in the upward direction is
=.7056 N.s
