Question

Anyone able to help me please!

An explosion blows a rock into three pieces. Two pieces fly off at right angles to each other.

Determine the mass and direction of the third piece.

(drawing incoming).

Answer 1

so the Initial momentum =0

Answer 2

After the explosion I got:

PX] (1 kg * -12 m/s) + (3kg * 0 ) + ( m * Vx ??? ) I don't know what to do here

Answer 3

PY] (1 kg * 0 ) + (3 kg * 8 m/s) + ( m * Vy ???? ) I don't know either

Answer 4

that's all I could think of :(

Answer 5

Px] -12 + m(Vx) = 0
Py] 24 + m(Vy) = 0

Answer 6

12 + m * 30 m/s = 0 ???

Answer 7

12 = -30m ???

Answer 8

m = .4 kg ???

Answer 9

i know it's wrong lol... ugh