A bomb of mass 30 kg at rest, explodes into two pieces of masses 18 kg and 12 kg . The velocity of 18 kg mass is 6 m s - 1 . The kinetic energy of the other mass is

Question

A bomb of mass 30 kg at rest, explodes into two pieces of masses 18 kg and 12 kg . The velocity of 18 kg mass is 6 m s - 1 . The kinetic energy of the other mass is, 324 J, 486 J, 256 J, 523 J

MARKS App · Accepted Answer

Form conservation of linear momentum m 1 v 1 + m 2 v 2 = 0 v 2 = - m 1 m 2 v 1 = - 18 12 6 = - 9 m s - 1 K E = 1 2 m 2 v 2 2 = 1 2 × 12 × 9 2 = 486 J

Search any question & find its solution

Looking for more such questions to practice?