Chapter 12 – Friction

The hinges of creaking doors are oiled to:

A matchstick catches fire when struck against the side of the matchbox because:

Which of the following is true about friction:

Talcum powder should not be spilled on the floor of room because:

The easiest way to move a heavy wooden crate is to:

The two common forces that are acting everywhere around us are:

If we apply the force along the right, the friction acts along the:

Which of the following is true:

Gymnasts apply some coarse substance on their hands to:

In which of the following friction is troublesome:

In which of the following friction is helpful:

Function can be reduced by:

Drag is:

When one body roth over the surface of another body, the resistance to Its motion is called:

Friction the rehuye motion between Io surfaces In contact.

To increase friction:

Which of the following has least friction:

Ball hearing:

Drag is:

The frictional force of smooth surface is:

This type of friction is the most powerful of all types of frictions:

When two objectives are already moving the friction between them is called:

Ball-bearings are used to convert static friction into:

To convert the static, sliding friction into rolling friction, the heavy luggage carriers are attached with at their base.

Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. Their arrangements are given below – Choose the correct arrangement:

Alida runs her toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be:

The force of friction between two bodies is:

A coin pushed on a table stops because:

The main cause of wear and tear of machine is:

Ball rolling on the floor stops due to: