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NemiM [27]
3 years ago
13

A hiker starts at point P and walks 2.0 km due east and then walks at an angle of 30 degrees north of east for 1.4 km.

Physics
1 answer:
olchik [2.2K]3 years ago
8 0

Answer:

The magnitude of the hiker’s displacement is 2.96 km

Explanation:

Let the initial displacement of the hiker, = x = 2km

the final displacement of the hiker, = y = 1.4 km

The resultant of the two vectors, According to Pythagorean theorem is the vector sum of the two vectors.

R' = x' + y'

Check the image uploaded for solution;

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Answer:

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Explanation:

From newton's law of universal gravitation,

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Substituting into equation 1

F = 6.67×10⁻¹¹×7.9×6.1/2²

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3 years ago
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Answer:

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W = 810.6 J

Explanation:

a.

Using first law of thermodynamics:

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<u>ΔU = - 310.6 J (negative sign indicates decrease in internal energy)</u>

<u></u>

b.

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W = PΔV

W = (202650 Pa)(0.004 m³)

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