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Grade 12th passMechanics

Q.NO43- A body travels half of its total path in the last second.Q.NO44-The measured mass and volume of a body are 25.00g and 5.0cm

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Profile image of kundan kishor
8 Years agoGrade 12th pass
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1 Answer

Profile image of Arun
8 Years ago
velocity of the body when it travels half of the path v=sqrt(g*h)
Now in 1 second it travels rest half path so s=u*t+.5*g*t^2
0.5h=sqrt(gh)+0.5*g
=>h^2-6gh+g^2=0
=>h=.5*g*(6+4sqrt(2))
 
now t=sqrt(2*h/g)
t=sqrt(6+4sqrt(2))
 

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