- The force which helps to write on blackboard by chalk is _______________ .
- Name any machine in which ball bearing is used to reduce friction.______________
- Name two methods to reduce friction:- ___________ , ____________.
- _____________ is used in cycle brakes to increase friction.
- Treaded tyres of cars, trucks etc. provide better _______________ with ground.
Dear Student,
1. frictional force
2. Roller skates
3. lubricating or using ball and bearings
4. brake pads
5. friction
Regards
1. frictional force
2. Roller skates
3. lubricating or using ball and bearings
4. brake pads
5. friction
Regards