how long after the beginning of motion is the displacement of a harmonically oscillating particle equal to one half amplitude if the period is 24 second and particle starts from rest

A particle on a speing executes shm when the particle is found at x=xmax/2 the speed of the partcle is 

A)vx=vmax 

B)vx=√3vmax/2

C)vx=√2vmax/2

D)vx=vmax/2

displacement associated with three dimensional wave is given by sai x y is equal to 1 + 1 by 2 x + root 3 by 2 k x minus omega t show that the wave propagates along a direction making an angle 60 degree with the x-axis

What do you mean by Energy of Simple Hormonic Motion?

 

What is mean by motion and time define it's all types with there parts and their s.i. units.

explain the effects of doppler effect in satellite communication