Question

An object, of mass 3 kg, moving with a velocity of 5 ms-1 along the positive X-
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- each.
Find the speed of the third fragment.​

Answer 1

Explanation:

by conservation of linear momentum

m1u1=m2u2-m3u3+m4u4

sign convention

3×5=1×2-1×2+1×u4

15=1×u4

u4=15m/s

Answer 2

Answer:

Explanation:

By applying the principle of conservation of linear momentum is

3m ×v √(m×60 )^2 + [m× 60 ]^2

V =20 √2m/s