Consider the following:
1. Treaded tyres
2. Lubricants
3. Ball bearings in machines
Which among the above is/are used to reduce friction?
1
2 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 3
Consider the following:
1. Treaded tyres
2. Lubricants
3. Ball bearings in machines
Which among the above is/are used to reduce friction?