A 0.30kg block is executing simple harmonic motion on a frictionless horizontal table with amplitude 0.12m and time period 1.0s.
(i) Calculate its speed when it is 0.060m away from the equilibrium position.
(ii) Find the speed of the block at the instant when its potential energy equals its kinetic energy.
(iii) If at x=−0.060m the block is moving toward the equilibrium position, state the sign of its velocity and justify your answer.