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CBSE - IX - Physics - Gravitation

A stone is dropped from the edge of a roof.

Asked by samrid vinod samridvinod 10th September 2013, 6:41 PM
Answered by Expert

Answer:

initial velocity, u  = 0
distance dropped be h
if h = 4.9 m
we know acceleration, g = 9.8 m/s.s
 
thus using second equation of motion, h = ut + 1/2gt2
we can find time required t.
 
for that t, we can use first equation of motion to find final velocity, v
v = u + gt
 
for last part, the acceleartion remains same, only velocity varies.
Answered by Expert 11th September 2013, 12:09 AM

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