Question

Gravitational force acts on all objects in proportion to their masses.whydoes a heavy object not fall faster than a light
object?
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Answer 1

greater the mass larger the gravity act upon it

Answer 2

This is because gravitational force attract objects on the basis of the mass of the object ,that means the object which mass is 2m will be attached with the force 2f in comparison to the attraction of a body with mass m with force of attraction f. So , in this way they cancel each other.So both will have same acceleration.

This is done by Galileo for the first time.