Subject Experts Solutions for Chapter: Force, Exercise 5: Exercise

Differentiate between electrons and protons.

Differentiate between rolling friction and sliding friction.

Differentiate between static friction and kinetic friction.

Give reasons for the following.
When a glass rod is rubbed with silk cloth and brought near a pith ball, the ball gets attracted towards it.

Give reasons for the following.
Ball bearings are used for reducing friction.

Give reasons for the following.
Easy to push a trolley of $20 \mathrm{kg}$ than carton box of $20 \mathrm{kg}$ .

Choose the odd one out. Give reasons for the choice.

Gravitational force, tension force, applied force.

Choose the odd one out. Give reasons for the choice.

Lubricant, ball bearings, treaded patterns.