Recent content by guest948

Thanks, but constant acceleration (deceleration) is assumed in this question.

APPROACH 1 (correct): Height above ground = 3 - (v+u)/2 * t = 3 - 18.263/2 * 0.25 = 0.717 m ----------------------------------------------------- APPROACH 2 (incorrect): Let d be the height from the ground when he is stopped by the cushion. PE loss = Work done against motion by cushion mgh =...

The path lengths are the same, so they are in phase and they add constructively along PQ. So the answer is C (or A)?

I guess C: constructive interference pattern along the central line. Am I correct?