[单选题]
A brick is moving at a speed of 3 m/s andj)* n4fh*ttfk9n-cb q a pebble is moving w.o(i r is:o qfz9as4(tlq.x( at a speed of 5 m/s. If both objects have the same kinetic energy, what is the ratio of the brick's mass to the rock'((rfitiq:wxl a.4sq zs o.o(9s mass?
