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IceJOKER [234]
3 years ago
11

You decide to walk part of the way around a lake. The lake is a circle with a radius of 2.0 km You start on the shore due south

of the lake and walk three-fourths of the way around the lake. ending up on the shore due east of the lake. What is your displacement?
Physics
1 answer:
AveGali [126]3 years ago
7 0

Answer:

2.828 km

Explanation:

radius of lake, r = 2 km

Let O be the centre of the circular lake and you walk from A to A to D.

Displacement is the measure of shortest distance between two points.

According to the diagram , the displacement AD is

AD^{2}=AO^{2}+OD^{2} (By using the Pythagorean theorem)

AD^{2}=2^{2}+2^{2}

AD = 2.828 km

thus, the displacement is 2.828 km.

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3 years ago
It is generally seen that, when a substance absorbs heat energy, its heating curve shows two plateaus. Which phenomenon is indic
Tatiana [17]

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Change of phase.

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If the refractive index of water is 1.33, then its critical angle is...
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2 years ago
Suppose our experimenter repeats his experiment on a planet more massive than Earth, where the acceleration due to gravity is g
Ne4ueva [31]

Answer:

C

Explanation:

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- Let acceleration due to gravity @ earth be g = 30 m/s^2

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- The average time taken for the ball to cover a distance h from chin to ground with acceleration g on earth is:

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