Question

Using following data, draw time - displacement graph for a moving object:

Use this graph to find average velocity for first 4 s, for next 4 s and for last 6 s.

Answer 1

 

Average velocity for first 4 s. 

Average velocity = Change in displacement /Total time taken 

v = 4- 0 /4 -0 =4/4 = 1 m s^–1 

For next 4 s, v = 4 -4 /8-4 = 0 /4 = 0 m s^–1 

(or as x remains the same from 4 to 8 seconds, velocity is zero) 

For last 6 s, v =0 -6 /16- 10  = –1 m s^–1