A moving body of mass m and velocity 3 ~km / h collides with a rest...

A moving body of mass

m

and velocity

3 \mathrm{~km} / \mathrm{h}

collides with a rest body of mass 2 m and stick to it. Now the combined mass starts to move. What will be the combined velocity? A moving body of mass m and velocity 3 ~km / h collides with a rest body of mass 2 m and stick to it. Now the combined

A moving body of mass m and velocity 3 ~km / h collides with a rest body of mass 2 m and stick to it. Now the combined

Options

A $4 \mathrm{~km} / \mathrm{h}$
B $1 \mathrm{~km} / \mathrm{h}$
C $2 \mathrm{~km} / \mathrm{h}$
D $3 \mathrm{~km} / \mathrm{h}$

Correct answer

B. $1 \mathrm{~km} / \mathrm{h}$

Step-by-step solution

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