Question

Answer the following questions in one sentence each.
1.Give one example of a contact force.
2. Give one example of a non-contact force.
3. Mention one situation in life where friction is necessary.
4. Mention two methods to minimize friction.
5. Mention two methods to increase friction.​

Answer 1

1. A bucket of water lifted.

2.force exerted by a magnet on a piece of iron .

3.we are able to walk because of friction

4. Two methods to minimize friction is:-

a. Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction.

b.Reduce the contact between the surfaces.

5. Two methods to increase friction is:-

a.By increasing the mass of the object that is causing friction.

b.By creating a rougher point of contact.