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Answer is simply press the accelerator or if you're driving a car with manual transmission and the car is not automatic you should shift into the appropriate gear depending on the speed at which you are going up the hill. It is important to remember to press the accelerator pedal gradually and continuously as you go up and down the hill since sudden acceleration or deceleration could cause the car to skid. It is also important to avoid sudden turns or stops while driving on a steep incline.
how to accelerate car on slope
how to accelerate car on slope