A truck starts from rest and accelerates uniformly at 
. At t = 10 s, a stone is dropped by a person standing velocity of the stone at t = 11 s is (Take 
)
Text Solution
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: For truck 
Let v be the velocity of the truck after 10s
As 
For stone,
When the stone is dropped from the moving truck it will possess a velocity along the horizontal equal to that of the truck at that time
Initial velocity of the stone along the vertical is zero. Let 
be the velocity of the stone along the vertical at 
i.e. after being dropped out of the truck
The resultant velocity of the stone at t=11 s is
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