Which of the following is true about friction:

In which of the following friction is troublesome:

Which of the following has least friction:

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

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:

Which is a streamlined object?

Spring balance is a device used for measuring the _____________ acting on an object.