CAPE Physics Unit 1 · May/June 2022 · Paper 2

36 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)(i)2 marksDefine the term 'drag force'.
2. 1(a)(ii)2 marksDefine the term 'terminal velocity'.
3. 1(a)(iii)2 marksDefine the term 'uniform motion'.
4. 1(b)(i)3 marksState the meaning of EACH term on the right-hand side of the equation F_D = 6 π r η v.
5. 1(b)(ii)1 markState ONE condition under which the equation F_D = 6 π r η v applies for the motion of a spherical object.
6. 1(c)(i)4 marksOn the grid provided in Figure 1 on page 7, plot a graph of velocity, v, against time, t. Draw a smooth curve through the points.
7. 1(c)(ii)3 marksExplain the shape of the graph plotted in (c)(i).
8. 1(c)(iii)2 marksUse the graph in (c)(i) to determine the terminal velocity, v_t, of the metal sphere, in m s⁻¹.
9. 1(d)(i)3 marksDetermine the units of k.
10. 1(d)(ii)2 marksGiven that m = 5 × 10⁻³ kg and r = 1 × 10⁻³ m, determine the value of k for glycerin at 30 °C.
11. 1(e)(i)2 marksExplain how the terminal velocity will be affected if a sphere of the same mass but twice the radius is used.
12. 1(e)(ii)2 marksExplain how the terminal velocity will be affected if a sphere of a different metal is used.
13. 1(f)2 marksExplain why the upthrust is neglected in the calculation of terminal velocity in this experiment.
14. 2(a)(i)2 marksState ONE similarity and ONE difference between a transverse wave and a longitudinal wave.
15. 2(a)(ii)2 marksGive ONE example of a transverse wave and ONE example of a longitudinal wave.
16. 2(b)3 marksExplain how a stringed instrument, such as a guitar, produces a sound.
17. 2(c)(i)3 marksA standing wave with three antinodes is set up on the string. In the space provided, sketch and label a diagram to show how the string would look when this standing wave is set up.
18. 2(c)(ii)4 marksWrite an equation for the wavelength when the string has n antinodes and use this equation to calculate the wavelength of the wave sketched in (c)(i).
19. 2(c)(iii)3 marksUsing the equation in (c)(ii), show that the relationship between the frequency of the vibrator and the number of antinodes, n, is given by f = (v / 2l)n, where v is the wave velocity and l is the length of the string.
20. 2(d)(i)4 marksOn the grid provided in Figure 3 on page 15, plot a graph of f against n. Draw the line of best fit through the points.
21. 2(d)(ii)4 marksUsing the graph in (d)(i), determine the velocity of the waves on the string.
22. 2(e)(i)3 marksList the order of the media through which the sound arrives at the other end of the pier. Give ONE reason for your response.
23. 2(e)(ii)2 marksCalculate the time taken for the sound waves to travel through the water to reach the other end of the pier, given that the speed of sound in water is 1482 m s⁻¹.
24. 3(a)(i)3 marksDefine the term 'stress', and state the unit in which it is measured.
25. 3(a)(ii)2 marksDefine the term 'strain', and state the unit in which it is measured.
26. 3(b)(i)4 marksDescribe the behaviour of the metal wire in EACH of the following segments of the graph: AB, BC, CD.
27. 3(b)(ii)2 marksExplain what is meant by the 'elastic limit' of a wire.
28. 3(b)(iii)1 markIf EACH major interval on the vertical axis of the graph in Figure 4 represents 150 MPa, determine the elastic limit of the wire.
29. 3(b)(iv)2 marksThe wire can be described as a ductile material. State TWO properties of ductile materials.
30. 3(b)(v)1 markIn terms of the wire, what does the interval AD on the graph represent?
31. 3(b)(vi)1 markState how the energy per unit volume stored in the wire during the loading process can be determined from the graph.
32. 3(c)(i)1 markState what is meant by the term 'high tensile strength'.
33. 3(c)(ii)2 marksUsing the graph in Figure 5, explain how the properties of spider silk make it more suitable than silkworm silk for building webs to catch insects.
34. 3(c)(iii)3 marksUsing the graph in Figure 5, determine the MAXIMUM amount of energy that can be stored by silkworm silk before it fractures.
35. 3(c)(iv)2 marksUsing the graph in Figure 5, determine the Young’s modulus of spider silk for small stresses.
36. 3(c)(v)6 marksAn insect flies into a spider’s web and becomes attached to a single thread, creating a tension of 580 μN. The thread extends by approximately 3% of its original length. Calculate the radius of a single thread of spider…