Question

the ratio of kinetic energy of two bodies A and B are 9 :16 if their masses are equal find the ratio of their velocities

Answer 1

[*2 indicates squared]

From K.E. = 1/2 m v*2

K.E. 1 m1 v1*2

--------- = ----- x ------

K.E. 2 m2 v2*2

. .

. MASSES ARE EQUAL

K.E. 1 v1*2

--------- = ------

K.E. 2 v2*2

9/16 = (v1/v2)*2

(3/4)*2 = (v1/v2)*2

.

. . Ratio =》3:4