Impulse, Δp, is the value of the change of the ball's momentum. To recall, we can express momentum, p, as the product of the object's mass and velocity. Mathematically, we have
[tex]p = mv[/tex]
[tex]\Delta p = m\Delta v[/tex]
[tex]\Delta p = m(v_{final}-v_{initial})[/tex]
where m is the object's mass and v is the object's velocity.
Since the ball bounced off opposite to its original direction, initial velocity and final velocity will have opposite signs. And hence, we have
[tex]\Delta p = 0.145(49 - -44) = 0.145(93) = 13.485[/tex]
Rounding the values off to three significant figures, we have Δp = 13.5 N·s.
Answer: 13.5 N·s
