Question

KE of body is 30J when velocity is 10m/s . What is KE when speed is 30 m/ S

Answer 1

Explanation:

KE =1/2mv^2 but KE = 30 and v = 10 m/s so m = 2*30/100 =3/4 and new KE =1/2*3/4*900=3*112.5=337.5J