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Grade: 9
        
a body travels half of its total path in the last second of its free fall fron rest. The duration of fall is nearly
4 years ago

Answers : (2)

Sher Mohammad
IIT Delhi
askIITians Faculty
174 Points
							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))

Sher mohammad
askiitians faculty
4 years ago
Arun Kumar
IIT Delhi
askIITians Faculty
256 Points
							



Thanks & Regards
Arun Kumar
IIT Delhi
Askiitians Faculty
4 years ago
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