The engine works hard and produces a lot more heat than when the car is driven on a leveled road. The car is usually driven slower on the uphill and there isn't as much air cooling the radiator.
But the main reason it overheats is that the cooling system is malfunctioning.
Your motor oil going bad would cause that. That is in the crankcase, not the transmission.
Your car is starting to overheat or your thermostat is going out. Get it checked.
Try changing the themometer
unless you have chains or studs it would be 0 friction
No. The car is applying a force to keep going up the hill and the hill and car are providing forces to keep it up.
No. The car is applying a force to keep going up the hill and the hill and car are providing forces to keep it up.
Electric fan or fan clutch has failed.
your car will overheat, there will be low pressure on your system.
thermostats problem my car did the same thing when mine went out
Yes car or bike brakes can overheat if they are used constantly for a long period such a coming down a long hill or driving fast along a windy road that requires heavy and frequent braking
If you temperature gauge is going up and down then you may have a problem with your sensor. You should take your car to a professional to ensure that you don't overheat your car.
Turning the heat on would actually lower the engine temperature. It's a well known trick if your car starts to overheat. Having the A/C on causes a power loss to operate the compressor, which would also cause engine temperature to go up due to the hot air from the condensor going through the radiator.