Question

A ball moves on a smooth floor in a straight line
with a uniform velocity 10 m - for 6 s. At t = 6 s,
the ball hits a wall and comes back along the same
line to the starting point with same speed. Draw the
velocity-time graph and use it to find the total
distance travelled by the ball and its displacement.
​

Answer 1

Distance travelled in first 6s = velocity × time

=10m/s × 6

= 60 m/s

Distance travelled in next 6s = velocity × time

= 10 m/s × 6

= 60 m/s

Total Distance travelled in 12s = 60+60

= 120 m

Total displacement = 0 (as the ball returns it's starting point)