Question

The velocity of a particle is zero at t = 0.
(a) The acceleration at t = 0 must be zero.
(b) The acceleration at t = 0 may be zero.
(c) If the acceleration is zero from t = 0 to t = 10 s, the speed is also zero in this interval.
(d) If the speed is zero from t = 0 to t = 10 s the acceleration is also zero in this interval.

Answer 1

(b) The acceleration at t = 0 may be zero.

(c) If the acceleration is zero from t = 0 to t = 10 s, the speed is also zero in this interval.

(d) If the speed is zero from t = 0 to t = 10 s the acceleration is also zero in this interval.