AQA A-LEVEL PHYSICS Paper 3 7408/3A||QUESTIONS & MARKING SCHEME MERGED||GRADED A+||

eriment in which a bouncing ball is illuminated by a stroboscope. The stroboscope flashes at a constant frequency. Figure 1 Suggest why T1 must be very short for this experiment. [1 mark] Question 1 continues on the next page 4 *04* IB/M/Jun23/7408/3A Do not write outside the box Figure 2 shows the first six images starting with n = 0, where n is the image number. Figure 2 The images are used to determine: H, the vertical distance from the bottom of the ball to the floor when n = 0 h, the vertical distance from the bottom of the ball to the floor for each non-zero value of n. The n = N image is produced at the instant that the ball hits the floor for the first time. For n between 0 and N it can be shown that 2 0 = 2 u n g n H h f f   − +     where u0 is the vertical velocity of the ball when n = 0 g is the acceleration due to gravity f is the frequency of the flashe