A proton is moving with velocity 7x10 m/s towards right
and neutron (mass nearly equal to that of proton) is
moving with velocity 4x109 mis towards left. They col-
lide and a deuteron is formed. The deuteron will
move with a velocity
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Explanation:
use conservation of momentum
mass of proton=m=mass of neutron
and deutron= 2m
u of proton= 7×10^6 (-î)
u of neutron= 4×10^6(î)
after collision both form deutron so we can take them as one system.
Now P initial= P final
m1u1+m2u2=(m1+m2)v
hence velocity of deutron= (m1u1+m2u2)÷(m1+m2)
=(4m×10^6 - 7m×10^6)÷2m
= 1.5×10^6(-î) m/s
so the newly formed deutron will move left with a velocity of 1.5×10^6 m/s..
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