How do tides occur due to the Moon gravitational pull according to Chapter 7 Gravitation?
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1 Answer
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The gravitational pull of the Moon is the main reason behind the tides of Earth and it is less dependent on the sun. The gravitational pull of the moon on Earth is stronger than the sun's gravitational pull due to Earth's proximity to the moon. The Earth's oceans get pulled by the moon's gravity, which creates a bulge of water on the side of the Earth facing the moon. Also, another bulge gets created on the opposite side due to the water's inertia. When the earth rotates, its areas pass through these bulges which form the high and low tides. Each day, two high and two low tides are created by the gravitational interaction.
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4.22

Let us consider a vector . The equation can be written as
Px = Py = 1 = = = …….(i)
So the magnitude of vector + =
Let be the angle made by vector , with the x axis as given in the above figure
= = , = 45 with the x axis

Let = -
– = ( –
= = 1
= =
Hence = . Therefore the magnitude of ( + =
Let
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