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What are forces that cancel each other out called?
Forces that cancel each other out are called balanced forces.
Where is its gravitational potential energy minimum?
The answer depends on what "it" is and the overall context. The answer could be the centre of the earth where the earth's gravity has no effect, or the Lagrange point where the gravitational forces of the moon, earth and sun balance each other.
What does the very small value of the gravitantional constant G tell us about the strength of gravitational forces?
Since G is very small - 6.673 * 10-11, or 0.00000000006673- we know that the gravitational force is very weak. It happens to be the weakest of the four fundamental forces of nature, and it explains how a mass as big as the Earth (6*1024kg)only affects us with a force of around 700N.
Do forces add up or cancel?
Forces have to be added as vectors. This means that in certain cases, the forces can cancel, and in other cases they can be added.
What is meant by x and y forces?
Horizontal and Vertical forces respectively.
