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Why it is difficult to start motion than to maintain it?
Theblackrover
To start with we have to change the speed right from zero to some value. So force is required and with that force work is to be performed. Hence energy is needed. After attaining that speed thereafter we need energy just to compensate the loss due to friction. Hence maintenance of the uniform motion is easier than attaining that uniform speed right from rest.
If v is the speed attained for a mass m, then 1/2 m v^2 is the energy required. There after just frictional force x displacement is energy required to maintain the motion.
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