A mass, hung from a spring, oscillates with simple harmonic motion. Which statement is correct?

The bob of a simple pendulum has a mass of $0.40kg$. The pendulum oscillates with a period of $2.0s$ and an amplitude of $0.15m$.At one point in its cycle it has a potential energy of $0.020$ $J$.What is the kinetic energy of the pendulum bob at this point?

State and justify whether the following oscillators show simple harmonic motion. A basketball being bounced repeatedly on the ground.

State and justify whether the following oscillators show simple harmonic motion: A guitar string vibrating

State and justify whether the following oscillators show simple harmonic motion: A conducting sphere vibrating between two parallel, oppositely charged metal plates.

State and justify whether the following oscillators show simple harmonic motion: The pendulum of a grandfather clock

The pendulum of a clock is displaced by a distance of $4.0cm$ and it oscillates in s.h.m. with a period of $1.0s$. Write down an equation to describe the displacement x of the pendulum bob with time t.

The pendulum of a clock is displaced by a distance of $4.0 \mathrm{cm}$ and it oscillates in s.h.m. with a period of $1.0 \mathrm{s}$. Calculate the maximum velocity of the pendulum bob.

The pendulum of a clock is displaced by a distance of $4.0cm$ and it oscillates in s.h.m. with a period of $1.0s$. Calculate: its velocity when its displacement is $2.0cm$.