When an object moving in simple harmonic motion is at its maximum ...

[dmcintosh]

When an object moving in simple harmonic motion is at its maximum displacement from equilibrium, which of the following is at a maximum?
  1.velocity
  2.acceleration
  3.kinetic energy

Question 2

For a simple harmonic oscillator, which of the following pairs of vector quantities can't both point in the same direction? (The position vector is the displacement from equilibrium.)
  1.position and velocity
  2.velocity and acceleration
  3.position and acceleration

[fatboyy09]

Answer to Question 1

2

Answer to Question 2

3