Engine power: The amount of power an engine produces decreases as the car travels uphill. This is because the engine has to work harder to overcome the force of gravity pulling the car back down. The steeper the hill, the more power the engine has to produce, and the more the car will decelerate.
Vehicle weight: The heavier a car is, the more force gravity has to pull it back down. This means that heavier cars will decelerate more quickly than lighter cars when going uphill.
Rolling resistance: Rolling resistance is the force that opposes the car's forward motion due to the friction between the tires and the road. Rolling resistance increases as the car's speed decreases, so it can contribute to deceleration when going uphill.
Air resistance: Air resistance is the force that opposes the car's forward motion due to the resistance of air passing over the car's body. Air resistance increases as the car's speed increases, so it can also contribute to deceleration when going uphill.
Driver input: The driver can also affect the car's deceleration going uphill. Shifting into a lower gear can help the engine produce more power and maintain speed. Avoiding quick acceleration and braking can also help reduce deceleration.
