A body of mass $5\, kg$ moving with a velocity $10\,m/s$ collides with another body of the mass $20 \,kg$ at, rest and comes to rest. The velocity of the second body due to collision is ......... $m/s$
A body of mass $5\, kg$ moving with a velocity $10\,m/s$ collides with another body of the mass $20 \,kg$ at, rest and comes to rest. The velocity of the second body due to collision is ......... $m/s$
$2.5$
$5 $
$7.5$
$10$
A body of mass $5\, kg$ moving with a velocity $10\,m/s$ collides with another body of the mass $20 \,kg$ at, rest and comes to rest. The velocity of the second body due to collision is ......... $m/s$
Momentum conservation
$5 \times 10 + 20 \times 0 = 5 \times 0 + 20 \times v$
==>$v = 2.5\,m/s$