← all papers · Physics · 9702 · Paper 2 variant 19702/21/M/J/24

Practice

1. Question 17 marks
   • 1(b)On Fig. 1.1, draw and label arrows to show the directions of the two forces acting on the sphere.2 marks
   • 1(c)Calculate the drag force F_D acting on the sphere.2 marks
   • 1(d)Use your answer in (c) to calculate the drag coefficient C for the sphere.3 marks
2. Question 27 marks
   • 2(a)Define velocity.1 mark
   • 2(b)(i)Determine the time taken for the ball to reach the wall.2 marks
   • 2(b)(ii)Calculate the vertical component u of the initial velocity of the ball.1 mark
   • 2(b)(iii)Calculate the height h of the wall.3 marks
3. Question 37 marks
   • 3(b)By considering the conservation of momentum in two dimensions, calculate the magnitudes of v and w.4 marks
   • 3(c)Calculate the magnitude of this force.3 marks
4. Question 48 marks
   • 4(a)Define strain.1 mark
   • 4(b)(i)Calculate the Young modulus of the wire.3 marks
   • 4(b)(ii)On Fig. 4.1, draw a line to show how the stress varies with the strain for the wire up to its limit of proportionality.2 marks
   • 4(c)By placing a tick (✓) in each row, complete Table 4.1 to compare the stress and strain of the two wires.2 marks
5. Question 58 marks
   • 5(a)Explain how a stationary wave is formed between the vibration generator and the wall.2 marks
   • 5(b)Calculate the wavelength of the stationary wave shown in Fig. 5.2.1 mark
   • 5(c)On Fig. 5.3, sketch the shape of the stationary wave at time t = 0.24 s.2 marks
   • 5(d)State the phase difference between the oscillations of points R and T.1 mark
   • 5(e)Calculate the speed of the progressive waves on the stretched string.2 marks
6. Question 66 marks
   • 6(a)State Kirchhoff's first law.1 mark
   • 6(b)Use Kirchhoff's laws to show that the total resistance R_T of the external circuit is given by R_T = R₁ + R₂.2 marks
   • 6(c)Calculate the internal resistance r of the cell.3 marks
7. Question 78 marks
   • 7(a)State the nuclide notation in the form ᴬ_Z X for this nucleus of copper.1 mark
   • 7(b)(i)Use Fig. 7.1 to explain why other particles apart from the β⁻ particles must be emitted during this decay.3 marks
   • 7(b)(ii)State the name of the other particle emitted during the decay of this isotope.1 mark
   • 7(b)(iii)Give the radioactive decay equation for this decay.3 marks