Can the equation of kinematics be used when the acceleration varies with time? If not, what form would these equations take?

Can equation of Kinematics be used in a situation where the acceleration varies in time?Can they be used when acceleration is zero?

Write the symmetric form of the equation of a line.

Obtain equations of motion for constant acceleration using method of calculus.

When can Winnowing be used ?

The motion of a particle is expressed by the equation a = -bx where 'a' is acceleration, 'x' is the displacement from the equilibrium position and 'b' is a constant. The periodic time will be