A body of mass 6 kg collides with another body at rest. After the collision, they travel together with a velocity that is one third of the initial velocity of 6 kg mass. The mass of the second body is

60 kg

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30 kg

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12 kg

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18 kg

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Solution

The correct option is C
12 kg

$m_{1} = 6 k g u_{1} = ?, u_{2} = 0; v_{1} = v_{2} = \frac{u_{1}}{3}, m_{2} = ? L . O . C . M : m_{1} u_{1} + m_{2} u_{2} = (m_{1} + m_{2}) v m_{2} = 12 k g$

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A body of mass 6 kg collides with another body at rest. After the collision, they travel together with a velocity that is one third of the initial velocity of 6 kg mass. The mass of the second body is

The correct option is C 12 kg m1=6kg u1=?, u2=0; v1=v2=u13, m2=?L.O.C.M:m1u1+m2u2=(m1+m2)vm2=12kg

The correct option is C
12 kg

$m_{1} = 6 k g u_{1} = ?, u_{2} = 0; v_{1} = v_{2} = \frac{u_{1}}{3}, m_{2} = ? L . O . C . M : m_{1} u_{1} + m_{2} u_{2} = (m_{1} + m_{2}) v m_{2} = 12 k g$