The velocity of the baseball after it has been hit is 106.67 m/s and moving towards east.
Given that, impulse = 20 N/s
Mass m = 0.3 kg
Initial velocity of the baseball Vi = 40 m/s
We know the formula for impulse as change in momentum. It can be written as,
Impulse = m ( Vf - Vi)
20 = 0.3* (Vf - 40)
66.67 = -Vf - 40
Vf + 66.67 + 40 = 0
Vf = - 106.67 m/s
The velocity of the baseball after it has been hit is 106.67 m/s but in the opposite direction to the initial velocity direction of the ball.
Thus, the ball moves with 106.67 m/s towards east.
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