# Problem: A simple pendulum is shown in several states. In case A the mass is traveling back down to the bottom and is in between the bottom and its max height. In case B the mass is at its max height and has a speed of zero. In case C the ball is at its lowest position.Which of the following statements about the magnitude of the mass's angular acceleration is true?a) It is maximum in case A.b) It is maximum in case B.c) It cannot be determined d) It is zero in all cases. e) It is maximum in case C.f) It is equal in all cases, but is non-zero.

###### FREE Expert Solution

Force is proportional to displacement in simple harmonic motion. Force is maximum at maximum displacement.

From Newton's second law,

ΣF = mat = mαr, where α is the angular acceleration.

93% (430 ratings) ###### Problem Details

A simple pendulum is shown in several states. In case A the mass is traveling back down to the bottom and is in between the bottom and its max height. In case B the mass is at its max height and has a speed of zero. In case C the ball is at its lowest position.

Which of the following statements about the magnitude of the mass's angular acceleration is true?

a) It is maximum in case A.

b) It is maximum in case B.

c) It cannot be determined

d) It is zero in all cases.

e) It is maximum in case C.

f) It is equal in all cases, but is non-zero.