A ball collides elastically with another ball of the same mass. The collision is oblique and initially oneoftheballs was at rest. Afterthe collision,the two balls move with same speed. What will be the angle between the velocitiesof the balls after the collision?
a)
b)
c)
d)
A ball collides elastically with another ball of the same mass. The collision is oblique and initially oneoftheballs was at rest. Afterthe collision,the two balls move with same speed. What will be the angle between the velocitiesof the balls after the collision?
a)
b)
c)
d)
Question ID - 100342 | SaraNextGen Top Answer
A ball collides elastically with another ball of the same mass. The collision is oblique and initially oneoftheballs was at rest. Afterthe collision,the two balls move with same speed. What will be the angle between the velocitiesof the balls after the collision?
a)
b)
c)
d)
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A ball collides elastically with another ball of the same mass. The collision is oblique and initially oneoftheballs was at rest. Afterthe collision,the two balls move with same speed. What will be the angle between the velocitiesof the balls after the collision? |
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1 Answer
127 votes
Answer Key / Explanation : (d) -
(d)
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Applying law of conservation of momentum, we get 
(i)
(ii)
According to law of conservation of KE,
or 
(iii)
From Eqs.(ii) and (iii),we have 
Or 
or 
127 votes
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