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Mazyrski [523]
3 years ago
15

How to calculate the velocity? the answer is 5.4 m/s I need the explication

Physics
1 answer:
Vanyuwa [196]3 years ago
7 0

Answer: sq. root of .735

Explanation:

multiply two on both sides.

(2) *2,94 = (0,200 * v^2) (2)

588 = 0400 * 2v^2

divide by 400 on both sides

1.47 = 2v^2

divide by 2 on both sides

.735 = v^2

take square root of both sides

\sqrt{.735)  or .85732141

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Answer:

t = 1.82

Explanation:

Given

u = 7.70m/s -- initial velocity

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Required

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s = ut + \frac{1}{2}gt^2

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t = \frac{-7.70\±\sqrt{7.70^2 - 4*4.9*-30.2}}{2*4.9}

t = \frac{-7.70\±\sqrt{651.21}}{9.8}

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Split the expression

t = \frac{-7.70+25.52}{9.8} or t = \frac{-7.70-25.52}{9.8}

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t = \frac{17.82}{9.8}

t = 1.82

Hence, the time to hit the ground is 1.82 seconds

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