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Newton's second law of motion is F = ma and his law of gravitation is F= GMm/r^2.g is the acceleration of free fall and can be substituted for a, F = mg.We can therefore see that g = F/m and can use that ...

A collision is elastic when the total amount of kinetic energy in the system is conserved, there is no loss in kinetic energy.
A collision is inelastic when the total amount of kinetic energy in the ...

Like charges repel and different charges attract, i.e. charges feel an electromagnetic (EM) force. Electrons (fundamental particles that 'orbit' around the nuclei of atoms) carry a negati...

The reason we feel weight isn't because gravity is pulling us down; it's actually because we can feel our body being "squished". When we're on Earth, gravity is trying to pull us down through th...

First I think it is useful to look at the definition of a geostationary satellite to find out why it appears to stay in the same place above the earths surface. It is an object that is above the equator, ...