Two Clowns Are Launched from the Same Spring-Loaded Circus Cannon $K _ { A } = \frac { 3 } { 2 } K _ { B }$

Multiple Choice

Two clowns are launched from the same spring-loaded circus cannon with the spring compressed the same distance each time.Clown A has a 40-kg mass;clown B a 60-kg mass.The relation between their kinetic energies at the instant of launch is

A) $K _ { A } = \frac { 3 } { 2 } K _ { B }$ .
B) $K _ { A } = \sqrt { \frac { 3 } { 2 } } K _ { B }$ .
C) K_A = K_B.
D) $K _ { B } = \sqrt { \frac { 3 } { 2 } } K _ { A }$ .
E) $K _ { B } = \frac { 3 } { 2 } K _ { A }$ .