JEE PHYSICS MCQ: GRAVITATION

1 Easy

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Understanding +4 | -1

According to Newton's law of gravitation, the magnitude of the force

F

on point masses

m_1

and

m_2

(say) is given by

|F|=\frac{G m_1 m_2}{r^2}

.
I. This equation is not directly applicable for the gravitational force between extended object (like the earth) and a point mass.
II. This equation can be applied to find the gravitational force between an extended object and a point mass provided

r

is the distance of the point mass from the geometric centre of the extended objects.
Which of the following statement(s) about this equation is/are correct?

View answer and explanation

Correct option: A

Only I

Option A is correct because Newton's law of gravitation in its simple form applies directly only to point masses, not extended objects without further calculation.

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. If the body is projected in a direction making an angle of

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