Question

A particle travels along the X-axis. Its velocity time graph is shown above.

At what time instant did the particle change its direction of motion?

• A. t = 5 sec
• B. t = 10 sec
• C. t = 15 sec
• D. t = 20 sec

Answer 1

The correct option is C

t = 15 sec

The velocity was +ve till just before 15 sec (i.e. particle going rightwards) and just after 15s it becomes -ve. (i.e. particle going left) So the particle changed its direction of motion at t = 15 sec.