A man generates a symmetrical pulse in a string by moving his hand up and down. At t = 0, the point in his hand moves upward passing through mean position. The pulse travels with speed of 3 m/s on the string & his hands passes 6 times in each second from the mean position. Then the point on the string at a distance 3 m will reach its upper extreme first time at time :- 1.25 sec. 1 sec  sec.none

A student fixes two ends of a rope to two rigid supports A and B, placed at a distance of 15m. He then gives a transverse horizontal jerk to create a pulse in the rope which moves from A to B, B to A, repeatedly. The pulse dies after completing three, to and fro journeys from A to B and back. The pulse takes 2 min and 30s to complete its entire journey. The speed of the pulse moving on the rope is

A body moving in the positive x direction passes the origin at time t = 0. Between t = 0 and t = 1 second, thebody has a constant speed of 24 meters per second. At t = 1 second, the body is given a constant acceleration of6 meters per second squared in the negative x direction. The position x of the body at t = 11 seconds is(A) + 99m (B) + 36m (C) – 36 m (E) – 99 m

A body starting from rest accelerates uniformly by along a straight line at the rate of 10 m/s2 for 5s. It moves for 2s with uniform velocity of 50 m/s. Then it retards uniformly and comes to rest in 3s. The total distance travelled by the body is:A 200 m B 300 m C 400 m D 600 m

For the wave in the previous question, that was moving at 250250 m/s up,in which direction could the displacement of the individual particles of the string be occuring?A) left and rightB) up and downC) a combination of the twoD) impossible to tell

For the wave in the previous question, that was moving at 200200 m/s right,in which direction could the displacement of the individual particles of the string be occuring?A) left and rightB) up and downC) a combination of the twoD) impossible to tell