Question

how fast a boy weighing 40 kg runs so that the kinetic energy is 50000j?​

Answer 1

Answer:

kinetic energy = mv²/2

50000 = 40(v)²/2

50000 = 20(v)²

50000/20 = (v)²

2500 = v²

v = 50m/s

Step-by-step explanation:

thank you