We can write 36/100 = 9/25 also
Let ‘n’ be the time of fall.
Using, S = ut + ½ at2
=> h = 0 + ½ gn2
=> n = [(2h)/g]1/2
Distance travelled in the nth second is,
Sn = u + (a/2)(2n – 1)
=> 9h/25 = 0 + (9.8/2)[2{(2h)/g}1/2 – 1]
=> 9h/25 = 4.9[2{2h/9.8}1/2 – 1]
Solving for h we get,
h = 122.5 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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21
31
41
Last Activity: 10 Months ago
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