An object is executing simple harmonic motion. What is true about ...

[dalyningkenk]

An object is executing simple harmonic motion. What is true about the acceleration of this object? (There may be more than one correct choice.)
 
  A) The acceleration is a maximum when the displacement of the object is a maximum.
  B) The acceleration is a maximum when the speed of the object is a maximum.
  C) The acceleration is a maximum when the displacement of the object is zero.
  D) The acceleration is zero when the speed of the object is a maximum.
  E) The acceleration is a maximum when the object is instantaneously at rest.

Question 2

The position x of an object varies with time t. For which of the following equations relating x and t is the motion of the object simple harmonic motion? (There may be more than one correct choice.)
 
  A) x = 5 sin23t
  B) x = 8 cos 3t
  C) x = 4 tan 2t
  D) x = 5 sin 3t
  E) x = 2 cos(3t - 1)

[samiel-sayed]

Answer to Question 1

A, D, E

Answer to Question 2

B, D, E

[dalyningkenk]

Excellent

[bimper21]

Thanks for the timely response, appreciate it