A cricket ball is dropped from a height of 20 meters. (a) Calculate the speed of the ball when it hits the ground. (b) Calculate the height of this height
sdevikrishna00855:
Could you please explain the second question b
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A) The speed will be 7.7 km per hour
B)20 meter
How it is possible! Here the height h=20m.This ball is under gravity therefore it's acceleration is g=10m/s^2. The initial velocity is u=0 bcoz freely falling body.. By v^2=u^2+2gh.. We get v= 20m/s...
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