A person sitting on the top of a tall building is dropping balls at regular intervals of one second.Find the positions of the 3rd,4th and 5th ball when the 6th ball is being dropped.
When the sixth ball was dropped, 5 seconds have elapsed
from the time the first ball was dropped, 4 seconds after the
second ball was dropped, 3 seconds after the the third ball was
dropped, 2 seconds after the fourth ball was dropped and 1 second
after the fifth ball was dropped.
Thus being said, when the sixth ball was dropped & since the 3rd ball
has been falling for 3 seconds, then
D3 = (1/2)(9.8)(3^2) = 44.1 meters
Since the fourth ball has been falling for 2 seconds,
D4 = (1/2)(9.8)(2^2) = 19.6 meters
and since the fifth ball has been falling for 1 second,
D5 = (1/2)(9.8)(1)^2 = 4.9 m
Three identical balls are placed on a frictionless
horizontal surface touching each other. They stick to
each other because of adhesive. Another ball of same
radius and mass m is placed over the void created by
the three balls. Find the forces applied by the balls
kept on the floor to each other if the system remains
in equilibrium.
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A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.
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Last Activity: 11 Months ago
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Last Activity: 3 Years ago
