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3 years ago

How do I start to solve? Would appreciate a walk-thru!

Mathematics

1 answer:

atroni [7]3 years ago

6 0

Answer:

t = 1 second

Step-by-step explanation:

Given: h = 16 ft

This movement is vertical free fall without initial velocity V₀ = 0

We will accept value of g= 10 m/s², but we must convert meters in the ft.

We know that 1 meter = 3.28 ft => 10 meters = 32.8 ft

According to this g= 32.8 ft/s²

The formula for calculating height is:

h = g · t²/ 2 => t² = 2 h/ g => t = √2 h / g

t = √ 2 · 16 / 32.8 = √ 32/32.8 = √ 0.98 = 0.99 ≈ 1 second

t = 1 second

God with you!!!

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$2\pi r=176\qquad|\text{divide both sides by}\ 2\pi\\\\r=\dfrac{176}{2\pi}\\\\r=\dfrac{88}{\pi}\qquad|\text{use}\ \pi\approx\dfrac{22}{7}\\\\r=\dfrac{88}{\frac{22}{7}}\\\\r=88\cdot\dfrac{7}{22}\\\\r=4\cdot7\\\\\boxed{r=28(cm)}$

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According to the moderator, I should take $\pi\approx3.14$ . You can do it like that. In my opinion, my solution is correct.

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