Force is determined by multiplying mass and gravity (F= mg). To determine the answer, the mass of the elephant (5600 kg) is multiplied with the gravity (9.8 m/s²). The answer is 5800 N. This is the upward gravitational force that the elephant exerts on the earth.
The Gravitational force is the force exited by an object towards the center of the earth. It is called the weight of an object. The Newton's 2nd law of motion says that for every action there is equal and opposite reaction. So, if the elephant exerts a force on the earth, the earth exerts an equal force to the elephant.
