The equation of simple harmonic wave is given by
x=4 cos (500 t-0.02 x)
where x, y and t are measured in metres, mm and seconds respectively. Find the values of (i)velocity of wave (ii)particle velocity amplitude (iii)the change in phase at a point in 1 millisecond and (iv)change in phase between two points separated by 10 m.

Answer

(i)`2500 ms^(-1)` , (ii)`2 ms^(-1)` , (iii)0.5 rad , (iv) -0.2 rad