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Answer on Mechanics | Relativity Question for Dennis Urwin

Question #2956
A vehicle of mass, m, kg, accelerates uniformly from rest to velocity of v, km/h, in a time of t, s, whilst ascending a gradient. The frictional resistance to motion is Fr (kN).

Compare and contrast the use of D-alembert's principle with the principle of conservation of energy when solving problems given below.

a) tractive effort between the wheels and the road surface
b) the work done in ascending the slope
c) the average power developed by the engine
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