Question

A 16 kg object with a velocity 7.5 m/s explodes into two equal fragments. One flies off with a velocity 2.5i -2.5j m/s.
What is the velocity of the other fragment in vector notation?

Answer 1

Momentum is conserved. With two masses, the second mass velocity must be the negative of the first.

V=-(2.5i-2.5j)

Answer 2

so the 7.5 is irrelevant ?

Answer 3

dis is rong