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kicyunya [14]
2 years ago
6

Estimate and determine the order of magnitude of the circumference of the Earth in miles and the speed of a sailboat in miles pe

r hour. The Earth's circumference is 10^4 mile and the the speed of a sailboat is 10^1 mile/hour. Estimate how many hours it would take to sail around the world in a sailboat?
Physics
1 answer:
solmaris [256]2 years ago
4 0

Answer:

= 1000 hours

Explanation:

Earth's circumference is 10⁴ mile

speed of a sailboat is 10¹ mile/hour

distance = speed × time

10⁴ = 10¹  × t

t = 10⁴ / 10¹

t = 10³

= 1000 hours

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Two cars leave towns 680 kilometers apart at the same time and travel toward each other. one car's rate is 10 kilometers per hou
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D = distance between the cars at the start of time = 680 km

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A ball is dropped from rest at a point 12 m above the ground into a smooth, frictionless chute. The ball exits the chute 2 m abo
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29,7 m

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B) MRUV

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Ep1 = m*g*H1

Ep2= m*g*H2

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Ek2  = m*g*(H1-H2)

By definition of cinetic energy:

m*(V2)²/2 = m*g*(H1-H2) --->  V2 = \sqrt{(2*g*(H1-H2)}

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<u>MRUV:</u>

The decomposition of the velocity (V2), gives a for the horizontal component:

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The time what takes the ball hit the ground.

Since: Y3 - Y2 = V2*t + (1/2)*(-g)*t²

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