How fast should a man of body of mass 50kg run so that his kinetic energy be 625J
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K.E =1/2*mv^2
625j=1/2*50*v^2
v^2=625/25
v^2=25
v= -/25
v=5
therefore his velocity should be 5 m/s
625j=1/2*50*v^2
v^2=625/25
v^2=25
v= -/25
v=5
therefore his velocity should be 5 m/s
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