﻿ A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 ms-1 to 20 ms-1 while passing through a distance 135 m in t second.  The value of t is  from Physics Motion in A Plane Class 11 Manipur Board

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A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 ms-1 to 20 ms-1 while passing through a distance 135 m in t second.  The value of t is

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The problem requires kinematics equations of motion

Let u and v be the first and final velocities of particle an a and s be the constant acceleration and distance covered by it.

From third equation of motion

v2 = u2 + 2as
(20)2 = (10)2 + 2a x 135
or
a = 300/2 x135 = 10/9 ms-2

Now using first equation of motion,

v= u +at

or

The problem requires kinematics equations of motion

Let u and v be the first and final velocities of particle an a and s be the constant acceleration and distance covered by it.

From third equation of motion

v2 = u2 + 2as
(20)2 = (10)2 + 2a x 135
or
a = 300/2 x135 = 10/9 ms-2

Now using first equation of motion,

v= u +at

or

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