This is a Short Answer type Questions as classified in NCERT Exemplar
Explanation- mass of body =2kg
From the above graph the body at x=0 when t=0 so body at rest.
So impulse is also zero.
From t=0s to t=4s graph becomes straight line which shows body is at uniform velocity
Beyond 4s graph is parallel to time axis, body is at rest
So tan=3/4
Impulse at t=4s= change in momentum= mv-mu
=m (v-u)
= 2 (0-3/4)= -3/2kgm/s
<p>This is a Short Answer type Questions as classified in NCERT Exemplar</p><p><strong><span lang="EN-IN">Explanation-</span></strong><span lang="EN-IN"> mass of body =2kg</span></p><p><span lang="EN-IN">From the above graph the body at x=0 when t=0 so body at rest.</span></p><p><span lang="EN-IN">So impulse is also zero.</span></p><p><span lang="EN-IN">From t=0s to t=4s graph becomes straight line which shows body is at uniform velocity</span></p><p><span lang="EN-IN">Beyond 4s graph is parallel to time axis, body is at rest </span></p><p><span lang="EN-IN">So tan</span><!- [if gte msEquation 12]-><em style="mso-bidi-font-style: normal;"><span lang="EN-IN" style="font-family: 'Cambria Math', serif; mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin;"><span class="mathml" contenteditable="false"> <math> <mi>θ</mi> </math> </span></span></em><span lang="EN-IN">=3/4</span></p><p><span lang="EN-IN">Impulse at t=4s= change in momentum= mv-mu</span></p><p><span lang="EN-IN"> =m (v-u)</span></p><p><span lang="EN-IN"> = 2 (0-3/4)= -3/2kgm/s</span></p>
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