How fast should a man of mass of 50 kg run so that kinetic energy is 625J
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Mass = 50kg
Kinetic Energy = 625J
½mv² = 625
=>½×50v² = 625
=>25v² = 625
=>v² = 25
=>v = 5m/s
So, the man must run with a speed of 5m/s
Cheers!
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