1) State and derive the Universal Law of Gravitation.
2) Write at least 5 properties of gravitational force.
3) Write the numerical value of "G" and its SI unit.
Answers
Answer:
2. all maases exert gravity on each other.
3. G= 6.6 ×10^(-11)
Answer:
1. Newton's universal law of gravitation states that every particle in the universe attracts every other particle with a force along a line joining them. The force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
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2. Property 1: The gravitational force is a long-range force, which exists between two particles, regardless of the medium that separates them.
Property 2: The gravitational force is directly proportional to the product of the mass of the two bodies. This means a larger mass will yield a larger force.
Property 3: The force obeys the inverse square law. The force is inversely proportional to the square of the distance between them.
Property 4: On the surface of the earth, the gravitational force produces a constant acceleration, g = 9.8 m/s2.
Property 5: Gravitational force always acts as a force of attraction. It tries to pull masses together, it never pushes them apart.
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3. In SI units, G has the value 6.67 × 10-11 Newtons kg-2 m2.
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