Question

A 0.2 kg baseball is pitched with a velocity of 40 m/sec and then batted to the pitcher with a velocity of 60 m/sec. What is the change of momentum of the ball?

Answer 1

The change in momentum of the baseball is 4 kg·m/sec.

Step-by-step explanation:

The change in momentum of an object can be calculated using the equation:

Change in momentum = Final momentum - Initial momentum

In this case, the initial momentum of the baseball is calculated by multiplying its mass (0.2 kg) by its initial velocity (40 m/sec). It gives an initial momentum of 8 kg·m/sec. The final momentum is calculated in the same way but using the final velocity of the baseball (60 m/sec). It gives a final momentum of 12 kg·m/sec. Therefore, the change in momentum of the baseball is 12 kg·m/sec - 8 kg·m/sec = 4 kg·m/sec.