A (n) 0.155 kg baseball is thrown with a speed of 18.4 m/s. It is hit straight back at the pitcher with a final speed of 18.4 m/s. What is the magnitude of the impulse delivered to the ball? Answer in units of kg · m/s.

5.704kg. m/s toward the pitcher

Explanation:

Impulse (Ft) = change in momentum

Impulse = m (v-u)

m=0.155 kg, v=18.4 m/s, u=18.4m/s

impulse=0.155[ - (18.4) - (18.4) ]

= 0.155 (-36.8)

= - 5.704 kg. m/s

the negative means towards the pitcher