Part 1) A rope is attached to a wall. A lecturer holding the unattached end pulls with a constant force (parallel to the rope) while moving their hand up and down (perpendicular to the rope) to create a pulse travelling towards the wall. The lecturer now wants to produce a pulse that takes a longer time to reach the wall. How can they achieve this? Select all the correct answers. The lecturer should pull the rope harder to increase the tension in the string. The lecturer should move the hand up and down more slowly. The lecturer should use a heavier rope of the same length, under the same tension. The lecturer should move the hand a greater distance up and down but at the same speed. Part 2) The graph below shows the vertical position (in cm) versus horizontal position (in m) at t = 0 s as a transverse wave travels along a rope. Use this figure to determine the amplitude and wave number for the wave. Give numeric answers with 2 significant figures for this p. y (cm) -1 -2 - . . . -3 - 4 -1 -0.5 0.5 1 1.5 2 2.5 3 3.5 4 x (m) m k = rad/m Part 3) Determine the speed of the wave if the angular frequency is 2.5 rad/s. Give your answer to 2 significant figures. Speed : m/s