A-LevelPhysicsForces, density and pressure9702/12 · Oct/Nov 2013 · Q111 Mark

A beam of α-particles collides with a lead sheet. Each α-particle in the beam has a mass of 6.6 × 10⁻²⁷ kg and a speed of 1.5 × 10⁷ ms⁻¹. 5.0 × 10⁴ α-particles per second collide with an area of 1.0 cm² of lead. Almost all of the α-particles are absorbed by the lead so that they have zero speed after collision. What is an estimate of the average pressure exerted on the lead by the α-particles?

A5.0 × 10⁻¹⁵ Pa

B5.0 × 10⁻¹³ Pa

C5.0 × 10⁻¹¹ Pa

D5.0 × 10⁻⁹ Pa

✓ Correct answer

C: 5.0 × 10⁻¹¹ Pa

Oracle Prep sorts past-paper questions by topic, so you can drill Forces, density and pressure and see which topics are most likely to come up next.

Topic: Forces, density and pressure, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2013 Paper 1 Variant 2, question 11.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content