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3 years ago

PLEASE HELP SOON I DONT UNDERSTAND THIS QUIZ

Mathematics

1 answer:

Fantom [35]3 years ago

6 0

1. h₀ = 70

v₀ = 0 since the rock is dropped it has no initial velocity

when the rock hits the ground the height = 0

plug into the formula

0 = -4.9t² + 0(t) + 70

0 = -4.9t² + 70

Add 4.9t² to both sides

4.9t² = 70

Divide both sides by 4.9

t² = 14.2857142857

Take the square root of both sides

t = 3.7796447301

t ≈ 3.8 seconds

I am not doing the rest I only did one just to help you understand a bit more

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