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22. A body accelerates uniformly from rest to 20m for 4 sec, then moveswith the same velocity for the next 6 sec. After then it retards to cometo rest in 2 sec.a) Draw the velocity- time graphb) Find the total distance covered by the object

Answer»

The image below contains the graph of the motion of the body.

The area under the graph gives the distance.

The area is a trapezium.

Formulae for getting area of a trapezium :

(a+b) /2 × h

a=6sb=12sh=20m/s

A=(6+12)/2 ×20

9×20=180m



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