A particle has maximum velocity at mean position and zero velocity at the extreme position. Is it sure test for SHM?

Is it true that P.E. at mean position is zero?

Are particle velocity and wave velocity the same?

calculate velocity of a particle executing S.H.M and show that it is maximum at the mean position and minimum (i.e. zero) at the extreme position.

What determines the maximum velocity of the photoelectrons?

What do you mean by critical velocity?

A particle is thrown up vertically with a velocity of 50 m/s. What will be its velocity at the highest point of its journey?