How does the force of attraction between two bodies depend upon their masses and the distance between them? $A$ student thought that two bricks tied together would fall faster than a single one under the action of gravity. Do you agree with his hypothesis or not? Comment.

(N/A) According to Newton's law of universal gravitation,the force of attraction $(F)$ between two bodies is directly proportional to the product of their masses ($m_{1}$ and $m_{2}$) and inversely proportional to the square of the distance $(d)$ between them: $F \propto m_{1} m_{2}$ and $F \propto \frac{1}{d^{2}}$.
This hypothesis is incorrect. Two bricks tied together will fall at the same rate as a single brick under the action of gravity in a vacuum (free-fall). This is because the acceleration due to gravity $(g)$ is independent of the mass of the falling object. Since both objects experience the same acceleration $(g \approx 9.8 \ m/s^{2})$,they will reach the ground at the same time.