# Answer the following question. State Newton’s law of gravitation and express it in vector form. - Physics

Short Note

State Newton’s law of gravitation and express it in vector form.

#### Solution

1. Statement:
Every particle of matter attracts every other particle of matter with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
2. In vector form, it can be expressed as,
vec"F"_21 = "G" ("m"_1"m"_2)/"r"^2(- hat"r"_21)
where, hat"r"_21 is the unit vector from m1 to m2. The force vec"F"_21 is directed from m2 to m1.
Concept: Universal Law of Gravitation
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#### APPEARS IN

Balbharati Physics 11th Standard Maharashtra State Board
Chapter 5 Gravitation
Exercises | Q 2. (xii) | Page 97