Question

4.
An object, of mass 3 kg, moving with a velocity of 5 m/s along the positive, X axis
direction, breaks up, by itself, into three equal mass fragments. Two of these move
along directions that are exactly opposite to each other with speeds of 2 ms-1 each
Find the speed of the third fragment.​

Answer 1

Answer:

15 m/s

Explanation:

Conserving momentum before and after,

MV = m1v1 + m2v2+m3v3

m1,m2,m3 = 1 kg since equal fragments

Since two fragments are having opposite momentum, they cancel each other (m1v1 = -m2v2)

3x5 = 1x v3

v3 = 15m/s