Answer:
Explanation:
Given the displacement of a particle expressed as
s(t) = 9 + 15sin(9πt) where s is measured incm and time in secs.
velocity is the change in displacement of the particle with respect to time:
v(t) = d(s(t))/dt
v(t) = 0+15(9π)cos(9πt)
v(t) = 135πcos(9πt)
Hence the velocity of the particle after t seconds is expressed as 135πcos(9πt)