A particle is in linear S.H.M. between two points A and B, 10 cm apart. Take the direction from A to B as the positive direction and give the signs of velocity, acceleration and force on the particle when itat 4 cm away from A going towards A.

A particle is in linear S.H.M. between two points A and B, 10 cm apart

1.	A particle is in linear S.H.M. between two points A and B, 10 cm apart. Take the direction from A to B as the positive direction and give the signs of velocity, acceleration and force on the particle when itat 4 cm away from A going towards A.
Answer» Solution :Refer Fig., here A and B represent the two extreme positions of an S.H.M. For VELOCITY, the direction from A and B is taken to be positive. For acceleration and the force, the direction is taken positive if directed along AP and negative if directed along BP. At 4 cm AWAY from A going TOWARDS A, the particle is at S, with a tendency to move along SA which is negative direction for velocity. Therefore velocity is negative but acceleration is directed towards mean position i.e. along SP, hence +ve SIMILARLY force is also +ve.