Physics (AS & A Level) · May / June 2018 · Paper 11 · Question 9
9702Linear momentum and its conservation
Two similar spheres, each of mass m and travelling with speed v, are moving towards each other. The spheres have a head-on elastic collision. Which statement is correct?
- AThe spheres stick together on impact.
- BThe total kinetic energy after impact is mv^2.
- CThe total kinetic energy before impact is zero.
- DThe total momentum before impact is 2mv.
As printed in the paper
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Correct answer: B. The total kinetic energy after impact is mv^2.
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