Final answer:
The gravitational force acting on the 6 kg cart will be stronger compared to the 2 kg cart, as the gravitational force is directly proportional to the mass of an object. Specifically, the force on the 6 kg cart is three times greater than the force acting on the 2 kg cart.
Step-by-step explanation:
The strength of the gravitational forces on the two carts will be different due to the difference in their masses. The gravitational force exerted on an object is equal to the mass of the object multiplied by gravitational acceleration (F = mg). In this case, since the mass of the 6 kg cart is three times that of the 2 kg cart, the gravitational force pulling it forward is also going to be three times stronger.
For instance, using 9.8 m/s^2 as the acceleration due to gravity, the 6 kg cart would experience a gravitational force of about 58.8 N (6 kg x 9.8 m/s^2), while the 2 kg cart would experience a gravitational force of about 19.6 N (2 kg x 9.8 m/s^2).
This answer adheres to Newton's law of universal gravitation, demonstrating that the gravitational force on an object is proportional to its mass.
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