The figure shows the shape of three strings on which sinusoidal transverse waves are propagating.
Channel: Doubtnut
Date: 2020-02-16

The figure shows the shape of three strings on which sinusoidal transverse waves are propagating. The arrows in the diagram indicate the direction of wave propagation. Out of the 6 particles marked (1, 2, 3, 4, 5, 6 ) how many have their instantaneous velocity and acceleration both directed towards their mean position.