Find the average velocity in the time intervals
(a)0 to 2s,(b)0 to 4s, (c) 2s to 4 s, (d)4 s to 7 s , (e) 0 to 8 s.
Find instantaneous velocity at
(a)`t=1.0s` (b)`t=3.0s`(c) `t=4.5 s` (d)`t=7.5 s` in the graph.

Answer

(a)`5ms^(-1);`(b)`1.2ms^(-1)`(c) `2.5ms^(-1);`(d)`-3.3ms^(-1);`(e)0;
(a)`5ms^(-1);`(b)`-2.5ms^(-1);`(c) 0; (d)`5.0 ms^(-1)`