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Question

A body started with a velocity of 20 ms1 and moving with an acceleration of 2 ms2. The distance (in m) travelled by the body in the 8th second is

A
35
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B
20
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C
12
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D
10
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Solution

The correct option is A 35
Given, u=20 ms1,a=2 ms2,n=8
As we know that, the distance travelled by the body in nth sec is given as
Sn=u+12a(2n1)
Sn=20+12×2(2×81)
Sn=20+(161)=20+15=35 m

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