A car of mass 1.2tonnes is travelling up a slope of 1 in 150 at a constant speed of 10m/s. if the frictional and air resistances are 100 newton , calculate the power exerted by the engine. the car descends the same slope working at a rate of 2kw what will be its acceleration when its speed is 20m/s if the resistances are the same? if the engine is shut off when the speed of the cat is 25m/s as it descends the slope, how long will it be before the car comes to test? I need the answer please