A Ball is thrown vertically upward from the foot of a tower. It crosses the top of tower twice after an interval of 4second reaches the foot of the tower 8second after it was thrown . What is the height of tower ? Take g=10ms-2
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In a projectile the time taken to reach the highest point from the point of projection is equal to the time taken to fall from the highest point to the point of projection. That means the time of ascent = time of descent
If the total time taken is 12sec then time taken to reach the highest point is 6sec.
Similarly in 6sec it crosses the same point, let's say point A(top of tower), so it takes 3 sec to reach the highest point and 3more secs to come back to point A.
Then see the attachment for the calculation.
HOPE IT HELPS.... :-)

If the total time taken is 12sec then time taken to reach the highest point is 6sec.
Similarly in 6sec it crosses the same point, let's say point A(top of tower), so it takes 3 sec to reach the highest point and 3more secs to come back to point A.
Then see the attachment for the calculation.
HOPE IT HELPS.... :-)

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