问题描述：
a car of mass 1500kg is moving up a straigt road,which is inclined at an angle *to the hrizontal,where sin*=1/14,the resistance to the motion of the car from non-gravitional forces is constant and is modelled as a single constant force magnitude 650N.The car's engine is working at a rate of 30kw.
find the acceleration of the car at the instant when its speed is 15m/s.
find the acceleration of the car at the instant when its speed is 15m/s.
问题解答：
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