In which cases do we use these formulas because there are 3 formulas to find force of attraction between 2 object and 2 formulas for (g)-acceleration due to gravity :
A)F=mg
B)F=G M×m/d²
C)F=ma
D)g=G M/R²
E)g=G M/d²
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Explanation:
correct formula for acceleration due to gravity is B
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Answer:
(A) F=mg Or (C) F=ma
These two formulas are same and equal. We use the first formula for finding Force under gravity and the third formula is for finding Force when the mass and acceleration of an object is given.
(B) F= GMm/r^2 We use this formula for finding the force between any two bodies in the universe whose masses and their disance between centres is given.
(D) g=GM/R^2 OR g= GM/D^2
The meaning of the these formulas is same but we use the first one for finding the value of g on any planet. Sometimes we use D instead of R but it tells us the separating distance between any two objects from the centre.
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