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Question

The initial velocity of a body moving along a straight line is7m/s. It has a uniform acceleration of4m/s2 The distance covered by the body in the5th second of its motion is


A

25m

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B

35m

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C

50m

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D

85m

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Solution

The correct option is A

25m


Step 1: Given data:

The initial velocity of a body moving along a straight line isu=7m/s.

The uniform accelerationa=4m/s2

The distance covered by the body n=5thsecond

Step 2: Explanation:

The distance covered by the body,

Sn=u+a22n-1

Now substitute the value in this formula,

Sn=7+422×5-1Sn=7+2×9Sn=25m

Therefore, the distance covered by the body in the 5th second of the motion is 25m.

Hence, the correct option is A.


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