1.

A body moves along an st. line with an acceleration of 3 ms for 2 seconds and then with an acceleration of 4 ms-2 for 3 seconds. What is his average acceleration?​

Answer»

ANSWER....

Given

Body moves with ACCELERATION of 3m/ s

for 2 seconds.

and,Body moves with acceleration of

4m/s for 3 seconds.

t 2 seconds.

t 3 seconds.

Erplanation :

TOTAL time = 2 +3 = 5 seconds.

From the average acceleration formula.

Let the acceleration be a'.Let the acceleration be a'

a't at + a"t?.

a'(5) = 3 X 2 + 4 x3

a= 6+12

5

a= 3.6

a=3.6m/s|

So, average acceleration of body is 3.6

m/s2


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