Energy released by spaceship explosion

[avenkat0]

Homework Statement

A 6.91x106 kg spherical spaceship in deep space explodes into two pieces, one 4.77 times the mass of the other.
NOTE: the velocity needs magnitude and direction (given by the sign).

a) Suppose the ship is initially at rest, and after the explosion the smaller piece is moving 57.6 m/s.
- Find the speed of the larger piece. 12.075 m/s
- Find the energy supplied by the explosion.

Homework Equations

.5mv^2

The Attempt at a Solution

I tried adding the .5mv^2's of both the masses but the answer comes out to be wrong

THank you

 

[avenkat0]

Desperate need of help in a hurry... sorry for the spam