AQA AS PHYSICS Paper 2

AS PHYSICS Paper 2 2 *02* IB M/Jun18/7407/2 Do not write outside the Section A box Answer all questions in this section. 0 1 Figure 1 shows the apparatus used by a student in an experiment to measure the acceleration due to gravity, g. Figure 1 In the experiment: • a block is used to raise one end of the air track as shown in Figure 1 • an air-track glider is released from rest near the raised end of the air track and passes through the first light gate and then through the second light gate • a piece of card of length d fitted to the air-track glider interrupts a light beam as the air-track glider passes through each light gate • a data logger records the time taken by the piece of card to pass through each light gate and also the time for the piece of card to travel from one light gate to the other. 3 *03* Turn over ► IB/M/Jun18/7407/2 Do not write outside the 0 1 . 1 Tab box le 1 gives measurements made with the light gates as shown in Figure 1. Table 1 Time to pass through first light gate / s Time to pass through second light gate / s Time to travel from first to second light gate / s 0.50 0.40 1.19 The length d of the piece of card is 10.0 cm Assume there is negligible change in velocity while the air-track glider passes through a light gate. Determine the acceleration a of the air-track glider. [3 marks] a = m s−2 Question 1 continues on the next page 4 *04* IB M/Jun18/7407/2 Do not write outside the 0 1 . 2 Two box further sets of readings, A and B, are taken each with the light gates in different positions along the air track. Assume the acceleration is the same in each set. Table 2 shows these additional sets of results. Table 2 Set Time to pass through first light gate /s Time to pass through second light gate / s Time to travel from first to second light gate / s A 0.61 0.42 1.77 B 0.55 0.37 2.11 Explain how the data in Table 2 show that the distance between the light gates in set B is greater than in set A. Assume there is negligible change in velocity while the air-track glider passes through a light gate. [2