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Two particles, of masses M and 2M, moving, as shown, with speeds of 10 m/s and 5 m/s, collide elastically at the origin. After the collision, they move along the indicated directions with speeds v 1 and v 2 , respectively. The values of v 1 and v 2 are nearly : 10 m/s 5 m/s v 1 v 2 2M 30° 45° 30° 45° M M 2M

1. 3.2 m/s and 12.6 m/s
2. 3.2 m/s and 6.3 m/s
3. 6.5 m/s and 6.3 m/s
4. 6.5 m/s and 3.2 m/s

Correct answer: 6.5 m/s and 6.3 m/s

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