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Last Modified: 1:01pm 10 Aug 11

Most of the situations you have seen so far involve forces which are constant in magnitude. For example, the gravitational force on a person of mass m=60 kg is always F = m*g = 588 N, whether the person is sitting, standing, walking, or riding a bus.
But there are quite a few real-life phenomena which give rise to forces which vary in strength.
Extra Material
Gravity Problems (G100)
Last Modified: 1:01pm 10 Aug 11

Most of the situations you have seen so far involve forces which are constant in magnitude. For example, the gravitational force on a person of mass m=60 kg is always F = m*g = 588 N, whether the person is sitting, standing, walking, or riding a bus.
But there are quite a few real-life phenomena which give rise to forces which vary in strength.
Extra Material
Gravity Problems (G100)
Last Modified: 1:01pm 10 Aug 11

Most of the situations you have seen so far involve forces which are constant in magnitude. For example, the gravitational force on a person of mass m=60 kg is always F = m*g = 588 N, whether the person is sitting, standing, walking, or riding a bus.
But there are quite a few real-life phenomena which give rise to forces which vary in strength.
Extra Material
Gravity Problems (G100)
Last Modified: 1:01pm 10 Aug 11
