Question

4. Why do you find it hard to drive a bicycle with less air pressure in the tyres?
a) because of addition of sliding friction
b) because of decrease in fluid friction
c) because of increase in fluid friction
d) none of these​

Answer 1

Answer:

a) Because of addition of sliding friction

Explanation:

The insufficient air in the tires increases the point of contact to the ground which in turn increases the friction. Increase in friction means that you'll have to put a lot of force to overcome that increased friction. which is why you have to put a lot of energy into paddling the bike. Hope this answers your question

Answer 2

because of addition of sliding friction .