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4 votes
if it takes a tennis ball falls straight down for 4 seconds from the top of a roof, how high above the ground is the roof?

User Sjaensch
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2 Answers

4 votes

high=1/2 a t^2

a about 10 ... 9.81

high=1/2x10x4x4=80.

User Anoush Hakobyan
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5.9k points
3 votes

high=1/2 a t^2

a about 10 ... 9.81

high=1/2x10x4x4=80.

User NFT Master
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5.5k points