Question

mention three situations in which it is necessary to increase friction

Answer 1

1) Braking eg. applying breaks of bike
2)walking
3)....

Answer 2

Answer:

1) hilltop

2) fast moving car

3) wet surface

Explanation:

1) when a car moving on a uphill friction is required because car may move downward if friction is not present.

2) fast moving car require friction to stop if friction is not there then car may lead to an accident

3) the wet surface area have less friction so the car may slide off the place if friction is not present