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Sep 20, 2013

# What is difference between 'g' and 'G'

What is difference between 'g' and 'G'

Syeda

Member since Jan 25, 2017

Answer. g is the gravitational force exerted by any planet. For earth it's 9.8m/s2. G can be g but g cannot be G.

Salar Khalid

g 1=acceleration due to gravity 2=varies from place to place 3=SI unit is ms-2 G unviersal Gravitational constant 1= it is universal constan 2= constant everywhere on earth 3=its SI unit is NM2KG-2

Amarnathreddy M

Member since Jul 9, 2013

 G stands for Newton's universal gravitational constant, whereas g stands for the acceleration due to gravity at a certain point. G = 6.67300 × 10-11 N.m2.kg-2, G is a constant throughout space and time and it is a scalar quantity. g = 9.8 m.s-2,   g is acceleration due to gravity which is a variable quantity and a vector qualtity.    According to Newton's law of universal gravitation the force of attraction between two bodies is given by F = GMm/r2 ---------- (i) From Newton's second law of motion the weight of a body of mass m is F = mg -----------------(ii) From (i) and (ii) mg = GMm/r2 or g = GM/r2 Note: g is a constant at a given location, which depends upon M and r.

Alexandria

G is the universal constant of gravitation. As we know that every body in the universe exerts a force on every other body, so the force exerted by it has a constant i.e. G which is 6.67 × 10-11 kg-1 s-2.  g is the gravitational force exerted by any planet. For earth it's 9.8m/s2. G can be g but g cannot be G.
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