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A body is moving in a straight line. Its displacement is given by x= A + Bt- Ct²where A, B, C are positive constants and t is the time. Which of the following holds good for the body?(1), Its acceleration decreases with time (2)Its speed first decreases becomes zero and then increases(3) It executes uniform motion(4) Its speed remains constant |
| Answer» A body is moving in a straight line. Its displacement is given by x= A + Bt- Ct²where A, B, C are positive constants and t is the time. Which of the following holds good for the body?(1), Its acceleration decreases with time (2)Its speed first decreases becomes zero and then increases(3) It executes uniform motion(4) Its speed remains constant | |