Verified answer

Energy E = P*t = m/2*V^2

V = √2*P*t/m = √2*224*0.28/0.075 = 41 m/sec 

We know the speed can be found from the kinetic energy in Joules = power * time

224W = 224J/s

224J/s*0.28s = 62.72J = ½mV² = ½*0.075*V²

2*62.72/0.075 = V² = 40.9²

V = 40.9m/s  A.)

Or about 147km/h which is about 92mph

Assuming the ball is thrown horizontally and starts from rest, the work done will increase the kinetic energy.  one Watt = one Joule per second 

224 J/s(0.28 s) = ½(0.075 kg)v² m²/s²

v = 40.8966... ≈ 41 m/s◄

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