Question

An object has 100 J of kinetic energy and a mass of 2 g. How fast was it traveling? 

Answer 1

k.e = 1/2 mv²

v is speed

100 = 1/2 × 2 . v²

100  =  both 2 cancel each  other . v²

Taking square root on b/s

√100 = √v²

10  =  v  =  speed

100