Question

how can velocity be negative?plz explain initial and final velocity

Answer 1

The position-time graph shows that the slope is changing (meaning a changing velocity) and negative (meaning a negative velocity). The velocity-time graph shows a line with a negative (downward) slope (meaning that there is a negative acceleration) Velocity is a measure of speed and direction. Initial Speed is the beggining speed and Final speed is the final speed. If initial speed is 0 m/s than it starts at zero, but Final speed gets to zero after the object slows down enough and deccelerates and loses all motion.

Answer 2

when the displacement bcome zero the velocity becomes zero
the vlcty at initial point.-initial velocty
the velocty at final point -final velocty