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3 years ago

Please help me...

Physics

1 answer:

Naddik [55]3 years ago

4 0

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A 910-kg object is released from rest at an altitude of 1200 km above the north pole of the Earth. If we ignore atmospheric fric

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In order to develop this problem it is necessary to use the concepts related to the conservation of both potential cinematic as gravitational energy,

$KE = \fract{1}{2}mv^2$

$PE = GMm(\frac{1}{r_1}-(\frac{1}{r_2}))$

Where,

M = Mass of Earth

m = Mass of Object

v = Velocity

r = Radius

G = Gravitational universal constant

Our values are given as,

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$r_1 = 1200 + 6371 km = 7571km$

$r_2 = 6371 km,$

Replacing we have,

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$v^2 = -2GM(\frac{1}{r_1}-\frac{1}{r_2})$

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$v = 4456 m/s$

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4 years ago

Which piece of evidence did Alfred Wegener use to develop the theory of continental drift?

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