Question

A body is moving in straight line. It's displacement is given by x= AC + Bt- Ct^2 where A, B, C are positive constants and t is the time. Which of the following holds good for the body? 1) It's acceleration decreases with time 2) it's speed first decreases becomes zero and then increases 3) it executes uniform motion 4) it's speed remains constant. please explain.

Answer 1

Please find the answer below. The correct option is (2)