(17%) Problem 4: A string is connected at one end to a vibrating reed and on the other to a weight pulling the string tight over a pulley. At the time t = 0 a photograph of the string looks like the picture at the left below. The wave is then observed to grow in amplitude, reaching a maximum of 3 cm at t = 0.02 sec. It then shrinks in amplitude, and then at time t = 0.06 sec appears flat, as shown below.

\fA 10% Part (a) In what direction is point A (shown on the left graph above) moving at t = 0? Grade Summary 0 Down. _ Q It 's not mo 'n at all Deductlons ' "' 9 - Potential 100% 0 Up. 0 Right. Submissions 0 Left. Attempts remaining: _ ( per attempt) detailed view Submit | l I give up! deduction. Hints remaining: _ Feedback: deduction per feedback. Hints: _ for a A 10% Part (D) In what direction is point B (shown on the left graph above) moving at t: 0? A 10% Part (c) Is point A or B moving faster at L': 0? A 10% Part (d) In what direction is point A moving at t = 0.06? A 10% Part (e) In what direction is point B moving at t = 0.06? A 10% Part (f) 15 point A or B moving faster at t = 0.06? A 10% Part (9) Between 1' = 0 and t = 0.06, would point A have moved to the left or the right on the string? A 10% Part (h) Between 1' = 0 and t= 0.06, would point B have moved to the left or the right on the string? A 10% Part (i) What is the period of the oscillation in seconds? A 10% Part (j) Explain what could be changed to make the velocity of point A zero throughout the oscillation. Give two different ways to do this, and explain why such a change would work