Question

The following equations represents position as function of time for particle moving in a straight line (A) x = 3t - 2 (B) x = -4t2 - 2 (C) (D) In which of the situation velocity is constant

Answer 1

Answer:

answer is A

since for a) if we do differentiation of x with respect to time is equals to 3 and for b) differentiation will be -8t

here in option b velocity is dependent on time ie. if time changes velocity also changes but in first case velocity will remain constant since it is independent of time