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Deduce the following equations of motions …

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Deduce the following equations of motions , (i) s=ut+(1/2) at2

Posted by M M 4 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 4 years, 2 months ago

Consider the linear motion of a body with an initial velocity u. Let the body accelerate uniformly and acquire a final velocity v after time t. The velocity–time graph is a straight line AB as shown below.

At t = 0, initial velocity = u = OA

At t = t, final velocity = v = OC

The distance S travelled in time t = area of the trapezium OABD

s = (1/2) x (OA + DB) × OD

s = (1/2) x (u + v) × t

Since v = u + at,

s = (1/2) x (u + u + at) × t

s = ut + (1/2) at²

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