Question

1. When you strike a matchstick on a rough surface it catches fire, why?
2. why do Gymnasts apply coarse substance on third hands?
3. Why is it more difficult to pull a boat on the beach than on the sea?

plz answer them the first and good answer will be marked as brainliest.

Answer 1

1 The matchstick reacts with the rough surface and catches fire.
2 Gymnasts apply that to increase friction for having firm grip.
3 It is more difficult because sand has a rough surface so it increases friction. The boat has a streamlined shape which makes it easy to pull it in water

Answer 2

It is difficult to pull the boat on the beach because of the friction between the boat and sand. But in the sea, there is less friction between the sea water and the boat. Hence, it is easier to pull the boat in the sea.