Question

When a man throws a ball vertically up his watch fall down from his hand.if the initial speep of the ball is 20m/s from a building.what will be its velocity when it reaches the ground if the height difference b/n them is 100m?
Someone will be glad to critique your thoughts.
Try using conservation of energy.

The business of his watch falling from his hand seems irrelevant. What does b/n mean?

Please work on your spelling, grammar and punctuation if you post here again.
tnx 4 ur coment but i post wat i had received frm ma frds.i was glad when i hear that 2 that's y i post it here.

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