H2 Physics 6 - Collisions and Impulse: Head-On Elastic Collision
What you will learn
- 2 kg ball at +6 m/s collides head-on with 3 kg ball at -2 m/s; collision is perfectly elastic.
- Conservation of momentum: 2(6) + 3(-2) = 2 v_1 + 3 v_2, so 6 = 2 v_1 + 3 v_2.
- Elastic condition: relative speed of approach equals relative speed of separation, so v_2 minus v_1 = 8.
Continue H2 Physics Collisions & Impulse Notes | A-Level
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