Which of the following statements is correct?
A) Average velocity is not a vector quantity.
B) The average velocity can always be expressed as a half of the sum of initial and final velocities.
C) An accelerating body always changes its direction of motion.
D) The instantaneous velocity is equal to the time rate of change of the displacement.
E) A body undergoing constant acceleration changes its velocity by increasing increments in succeeding equal time intervals.

Question

Quizplus · Accepted Answer

The definition of instantaneous velocity is the time rate of change of displacement, making statement D true. Statement A is false because average velocity is a vector quantity as it includes direction. Statement B is only true when acceleration is constant. Statement C is false because an accelerating body does not always change its direction of motion. Statement E is only true if the acceleration is constant.

Which of the Following Statements Is Correct