A body of mass $2 k g$ moving with a velocity of $6 m / s$ strikes in elastically another body of same mass at rest $.$ The amount of heat evolved during collisions is $: -$

36 J

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18 J

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9 J

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3 J

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Solution

The correct option is B $18 J$
Amount of heat evolved $=$ loss of energy
$\frac{1}{2} \frac{m_{1} m_{2}}{m_{1} + m_{2}} {(u_{1} - u_{2})}^{2}$
$= \frac{1}{2} [\frac{(2) (2)}{2 + 2}] {(6)}^{2} = 18 J$
Henc,
option $(B)$ is correct answer.

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A body of mass 2kg moving with a velocity of 6m/s strikes in elastically another body of same mass at rest . The amount of heat evolved during collisions is :−

The correct option is B 18JAmount of heat evolved=loss of energy12m1m2m1+m2(u1−u2)2=12[(2)(2)2+2](6)2=18JHenc,option (B) is correct answer.

A body of mass $2 k g$ moving with a velocity of $6 m / s$ strikes in elastically another body of same mass at rest $.$ The amount of heat evolved during collisions is $: -$

The correct option is B $18 J$
Amount of heat evolved $=$ loss of energy
$\frac{1}{2} \frac{m_{1} m_{2}}{m_{1} + m_{2}} {(u_{1} - u_{2})}^{2}$
$= \frac{1}{2} [\frac{(2) (2)}{2 + 2}] {(6)}^{2} = 18 J$
Henc,
option $(B)$ is correct answer.