Physics (AS & A Level) · May / June 2026 · Paper 12 · Question 18
9702Gravitational potential energy and kinetic energy
An alpha particle has $2.2 \times 10^{-13}\,\mathrm{J}$ of kinetic energy. What is the speed of the alpha particle?
- A$4.1 \times 10^{6}\,\mathrm{m\,s^{-1}}$
- B$5.8 \times 10^{6}\,\mathrm{m\,s^{-1}}$
- C$8.1 \times 10^{6}\,\mathrm{m\,s^{-1}}$
- D$1.2 \times 10^{7}\,\mathrm{m\,s^{-1}}$
As printed in the paper
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Correct answer: C. $8.1 \times 10^{6}\,\mathrm{m\,s^{-1}}$
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