A ball A collides elastically with another id | vedclass

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(B) In an elastic collision between two identical masses where one is initially at rest,the velocity component along the line of impact is exchanged.L

Vedclass · Accepted Answer

Velocity of ball $B$ after collision is $5 \, m/s$.

Vedclass · Answer

(B) In an elastic collision between two identical masses where one is initially at rest,the velocity component along the line of impact is exchanged.Let the line joining the centers be the $x$-axis.The initial velocity of ball $A$ is $v = 10 \, m/s$ at an angle $	heta = 60^o$ with the $x$-axis.The component of velocity of $A$ along the line of impact is $v_x = v \cos(60^o) = 10 	imes 0.5 = 5 \, m/s$.The component of velocity of $A$ perpendicular to the line of impact is $v_y = v \sin(60^o) = 10 	imes 0.866 = 8.66 \, m/s$.During the elastic collision,the velocity component along the line of impact is transferred from $A$ to $B$.Thus,after collision,the velocity of $B$ along the line of impact is $v_{Bx} = 5 \, m/s$ and $v_{By} = 0$.Therefore,the velocity of ball $B$ after collision is $5 \, m/s$.

$A$ ball $A$ collides elastically with another identical ball $B$ initially at rest. Ball $A$ is moving with a velocity of $10 \, m/s$ at an angle of $60^o$ from the line joining their centers. Select the correct alternative:

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