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CBSE Notes 2011-2012 » VIII-Science

Friction

These days we use suitcases with wheels because

Multiple choice question

These days we use suitcases with wheels because

Tyres have cut grooves in them

Multiple choice question

Tyres have cut grooves in them

Friction, that exists between two surfaces in contact, when there is no relative motion between them...

Multiple choice question

Friction, that exists between two surfaces in contact, when there is no relative motion between them, is called

Four students were asked to arrange forces due to rolling, static and sliding frictions in an increa...

Multiple choice question

Four students were asked to arrange forces due to rolling, static and sliding frictions in an increasing order. Their arrangements are listed below. Choose the correct arrangement. [NCERT]

The energy required to overcome friction is mainly converted into

Multiple choice question

The energy required to overcome friction is mainly converted into

Out of the following, the better lubricant, to be used in the moving parts of a machine, is

Multiple choice question

Out of the following, the better lubricant, to be used in the moving parts of a machine, is

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