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?

asked Mar 21, 2019 181k views

4 votes

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4 votes

high=1/2 a t^2

a about 10 ... 9.81

high=1/2x10x4x4=80.

7.7k points

3 votes

high=1/2 a t^2

a about 10 ... 9.81

high=1/2x10x4x4=80.

NFT Master answered Mar 28, 2019

7.3k points

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