How to understand that its a question of direct proportion or indirect proportion
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If the given quantity is in multiplication then it is directly proportional &if quantity is in division then it is inversely proportional.
But for proportionality there should be any constant .
eg. F=GMm/r squre
where G is universal gravitation constant
M is mass of earth
m is mass of body
r is distance of body
since G&M is constant
therefore. F directly proportional to mass of body
and F inversely proportional to r
But for proportionality there should be any constant .
eg. F=GMm/r squre
where G is universal gravitation constant
M is mass of earth
m is mass of body
r is distance of body
since G&M is constant
therefore. F directly proportional to mass of body
and F inversely proportional to r
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