Which of the following relationship between the acceleration a and the displacement x of a particle involve simple harmonic motion ?

Which of the following relationship between the acceleration a and the

1.	Which of the following relationship between the acceleration a and the displacement x of a particle involve simple harmonic motion ?
Answer» `a=0.7x` `a=-200x^(2)` `a=-10x^(2)` `a=100x^(3)` Solution :(c) REPRESENTS a simple HARMONIC MOTION.