Same reason as walking up stairs is hard - you have to overcome gravity.
gravity limits us because its hard to ride a bike up hill
Food.
it depends on how on how fast you petal and how fit you are
When you're braking hard, trying to climb a steep hill or turning hard.
A hill is hard to get up and a pill is hard to get down
A hill is hard to get up and a pill is hard to get down
My mom!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
No. On top of the hill the bike would have potential energy. If released, by letting the bike roll downhill, it'd turn into kinetic energy as the bike picks up speed.
Doing "high knees", squats, or running up a very steep hill with weights.
All of them...up hill is so hard!
to roll down the hill on a bike without pedaling is called coast or coasting
Sam Hill