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        the velocity v and displacement r of  body are related as v2=kr, whrer k is constant. what will be the velocity after 1 second? (give that the displacement is zero at t=0)
4 years ago

noogler
489 Points
							v=2r........................................v2=kr  (diff it w.r.t. t)                                            2va=kv......k=2a              a is acceleratin                                            v2=2ar............(v2-u2=2as)                                           r=1/2at2.........(s=ut+1/2at2)                                          a=2r/t2  substitute in v2=2ar.........v2=4r2/t2

4 years ago
kousheen
34 Points
							v2=krwe can write it as v=$\sqrt{}$krdiffentiating both sidesdu/dt = $\sqrt{}$k  ½ r-1/2 dr/dta=$\sqrt{}$k ½ r-1/2 . v =$\sqrt{}$k ½ r-1/2 . $\sqrt{}$k r1/2a=k/2 r0velocity after 1 sec-- v=u+at =0+k/2 r0 X 1so v=k/2 r0

2 years ago
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Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions