physics emegency!
posted by joe on .
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?

Momentum is conserved. With two masses, the second mass velocity must be the negative of the first.
V=(2.5i2.5j) 
so the 7.5 is irrelevant ?

dis is rong