CAPE Physics Unit 1 · May/June 2023 · Paper 2

31 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)2 marksDifferentiate between 'precision' and 'accuracy'.
2. 1(b)(i)2 marksComment on the accuracy of the results in Table 1. Justify your response.
3. 1(b)(ii)2 marksComment on the precision of the results in Table 1. Justify your response.
4. 1(c)1 markThe formula for centripetal force is F = mv^2 / r. Write an expression to determine the fractional error in F, given the fractional error in m, v, and r.
5. 1(d)(i)2 marksState the TWO conditions that must be satisfied if a body is moving with uniform circular motion.
6. 1(d)(ii)4 marksShow that the relationship between the period, T, the radius, r, and the masses, m and M, is given by T = 2π √(mr / Mg).
7. 1(e)(i)2 marksComplete Column 3 (1/M) and Column 4 (T^2) of Table 2.
8. 1(e)(ii)4 marksOn the grid provided in Figure 2, plot a graph of T^2 versus 1/M. Draw the line of best fit through the points.
9. 1(e)(iii)4 marksWrite the equation T = 2π √(mr / Mg) in the form y = mx + c to show that the gradient is 4π^2 mr / g. From your graph in (e)(ii), determine an experimental value for the gradient.
10. 1(e)(iv)2 marksUsing the equation for the gradient and the experimental value obtained in (e)(iii), calculate an experimental value for g.
11. 1(f)2 marksState, in words, Newton's law of universal gravitation.
12. 1(g)3 marksWith the aid of a sketch, explain why the equation E_p = mgh (where g = 9.81 m s^-2) cannot be used to calculate the potential energy of an orbiting Earth satellite.
13. 2(a)2 marksState the TWO conditions that must be satisfied for the oscillatory motion of an object to be considered simple harmonic.
14. 2(b)(i)2 marksState what the symbols A and ω represent in the equation.
15. 2(b)(ii)4 marksOn the grid provided in Figure 3, sketch THREE graphs to show how displacement, y, velocity, v, and acceleration, a, each vary with time, t, for an object undergoing SHM for ONE period of oscillation. Use the same time…
16. 2(c)(i)2 marksAssuming that Hooke's law is obeyed, calculate the extension produced in the spring.
17. 2(c)(ii)3 marksCalculate the maximum kinetic energy of the mass if it is displaced a further 0.045 m.
18. 2(d)(i)4 marksOn the grid provided in Figure 5, plot a graph of amplitude of vibration, y, against frequency, f. Draw a smooth curve through the points.
19. 2(d)(ii)3 marksUse your graph to determine the angular frequency of the wooden block when it is oscillating at maximum amplitude.
20. 2(e)2 marksExplain the meaning of the term 'diffraction of light'.
21. 2(f)(i)5 marksDetermine the number of rulings per mm on the grating.
22. 2(f)(ii)3 marksDetermine the highest order of fringes obtained on EACH side of the normal.
23. 3(a)(i)4 marksOutline TWO differences between boiling and evaporation.
24. 3(a)(ii)2 marksExplain what is meant by the 'specific latent heat of fusion' of a substance.
25. 3(b)(i)4 marksOn the axes provided in Figure 7, plot a graph of temperature, θ, versus time, t. Use the graph to determine the melting point of Y.
26. 3(b)(ii)5 marksFor the substance Y in (b), calculate the specific latent heat of fusion if 200 g of Y is heated at a steady rate of 500 W.
27. 3(c)(i)3 marksCalculate the temperature change of the water.
28. 3(c)(ii)4 marksAn unknown liquid is then passed through the same calorimeter at a flow rate of 120 g per minute. To obtain the same temperature change, the electrical supply is changed to 13 V and 1.2 A. Calculate the specific heat…
29. 3(c)(iii)3 marksState TWO advantages and ONE disadvantage of using the continuous flow method to determine the specific heat capacity of a liquid.
30. 3(d)(i)4 marksShow that the ratio of the temperature drop across each of the layers is inversely proportional to the ratio of the thermal conductivities of the layers, given that both layers are of the same thickness.
31. 3(d)(ii)1 markState ONE application of thermal insulation, other than the application described in (d).