Angular Velocity and other problems
1) A rotating body has an angular displacement of (teta) radians in time (t) seconds, the relationship between displacement and the time is
(teta) = 7t^3-5t^2+30
angulaer velocity when t = 3second
the acceleration when t = 3
the time when the acceleration = 0
water drain from a cylindrical tank of radius 4 meter. as the height h falls the pressure reduces and it is observer that the relationship h and time t is given by
find the rate that the heiht is falling after 3 s
the flow rate in liter persecond after 3 seconds
please can someone help me in solving the above problems and an explaination on the method .
thank you in advance.