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Two friends on roller-skates are standin...

Two friends on roller-skates are standing `5m` apart facing eachother. One of them throws a ball of `2kg` towards the other, who catches it. How will this activity affect the position of the two? Explain your answer.

Text Solution

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In the process, sepration between the two friends on roller skates will increase. To start with. Both, are at rest. When one throws the ball, he aquires a momentum (equal to momentum of the ball) in opposite direction and moves in opposite direction. The other friend who catches the ball acquires the momentum of the ball and moves away from his friends in the direction of motion of the ball.
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Knowledge Check

  • 10 friends (5 boys P, Q, R, S and T and 5 girls A, E, I, O and U) are playing a game and they are sitting in a circle. The distance between every two friends is equal. Two boys and two girls are facing opposite to the centre of the circle and other 6 friends are facing towards the centre of the circle. A is the fourth to the left of O, who is third to the right of P. R is second to the right of T, who is not near to E. There are three friends between I and R. S is second to the left of U and facing the centre of the circle. P and E are sitting opposite and facing each other. I is second to the left of Q. A is facing opposite to the centre of the circle. More than three boys or girls are not sitting together. Not more than two friends who are facing opposite to the centre of the circle are sitting together. What is the position of I vis- a -vis A ?

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