If the charge qA is doubled, the electric force between qA and another charge would also double. This is because electric force is directly proportional to the magnitude of the charges involved. Thus, increasing the charge qA would result in an increase in the electric force acting on it.
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Since, F = 9 x 109 q1q2/r2 provided force between two charges = 1NWhen the magnitude of each charge is double then F' = 9 x 109 (2q1)(2q2)/(2r)2 = FThe force on the charge will remain unchanged.
If acceleration due to gravity doubled, your weight on Earth would also double. This means that the force of gravity pulling you downward would be twice as strong as it is currently, causing you to feel heavier.
Doubling the force acting on a moving object would cause the object to accelerate at a faster rate, leading to an increase in its speed. This is in accordance with Newton's second law of motion, which states that the acceleration of an object is directly proportional to the force acting on it.
The strength of the gravitational force between the Moon and Earth would also double if the mass of the Moon doubled. This is because the force of gravity is directly proportional to the product of the masses of the two objects and inversely proportional to the square of the distance between them.
F=ma, if "a" doubles and "m" is the same, the resultant "F" will double. Acceleration is doubled if force is doubled, a1=f/m; a2= 2f/m= 2a1.