Answer to Question #347278 in Physics for maria

Question #347278

A ball falls 20meters from rest to the ground below

a)What is the velocity as it strikes the ground?

b)How long does it take to fall?

Expert's answer

(a)

"v=\\sqrt{2gh}=\\sqrt{2*9.8*20}=19.8\\:\\rm m\/s"

(b)

"t=\\frac{v}{g}=\\frac{19.8}{9.8}=2.0\\:\\rm s"

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