As my answer, it will be easier to walk uphill because force pulls your bike down and you might fall off and walking is easier.
no it is not easier alls you are doing is using up more energy!!!
Yes
easyer
It depends on your fitness level and the gradient.
gravity!
Gravity is one of he fundamental forces of nature. It is the force by which masses are attracted to each other. And this was the way the Earth assembled itself from odd bits of rock and junk that was floating in space. If gravity was stronger, the mountains would be shorter, and it would be harder to walk uphill. if gravity was weaker, the mountains would be higher, but more crumbly, and we could walk uphill easier (but further!).
550 cal.
depends on how far you walk, are you going uphill, downhill or is it flat? if you walk on a flat area then you will not burn as much as the other two, uphill you will burn the most. all in all you will not burn a lot of calories unless you walk a pretty good distance and even a couple miles of flat land will only burn around 70 calories. a couple miles uphill could burn over 150.
yes, it is good under doctors observation.
As an average 300 m (altitude) in one hour.
A bear can walk on two legs but only for a few steps even up hill.
it moves uphill and towards the surface of earth