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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 |
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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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