1.

A ball is gently dropped from a height of 20m . If its velocity increases uniformly at rate of 10m/s-2 , with what velocity will it strick the ground? After what time will it strike the ground?

Answer»

▪ Initial velocity = zero▪ HEIGHT = 20m▪ Acceleration due to gravity = 10m/s²To Find :▪ Final velocity of ball.▪ Time taken by ball to reach at the ground.Concept :→ Since, acceleration due to gravity has said to be constant through the journey, we can easily APPLY EQUATIONS of MOTION to solve this type of questions.→ For a body falling freely under the ACTION of gravity, g is taken positive.Calculation :⚾ Final velocity :⚾ Time taken by ball :



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