Q. 4:
Recall Newton's second law of motion,
[tex]F=m\cdot a[/tex]
Where F is the force, m is the mass, and a is the acceleration of the object.
Re-writing the above equation
[tex]m=\frac{F}{a}[/tex]
As you can see, if force is held constant then the mass of the object is inversely proportional to the acceleration of the object.
Quadrupling the mass means 4 times the mass
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