During World War I, Germany used a "Big Bertha" cannon to hurl shells into Paris 30 miles away. This gun also had a long barrel.
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To solve this problem we will apply the concept given by the law of gravitational attraction, which properly defines gravity under the function
Here,
G = Gravitational Universal Constant
M = Mass of Earth
r = Distance between the human and the center of mass of the Earth
The acceleration due to gravity when is 4 times the mass of Earth and 3 times the radius would be given as,
The weight is defined as
So the new weight would be given as
Therefore the weight under this condition is 288.8N