________is caused by the irregularities on the two surfaces in contact. - Friction, _______ device is used for measuring the force acting on an object. - Spring Balance , The frictional force exerted by fluids is called as _________. - Drag, The substance which reduce friction are called ___________. - lubricants, The force required to keep the object moving with the same speed is a measure of ___________friction. - Sliding, An air cushion between the moving parts is used to _________friction. - reduce, Motion of the book on rollers is an example of __________ friction. - Rolling, Static friction comes into play when the object is _________. - moves from rest, Name the type of friction. - Static Friction , Pulling a trolley is a type of ________ friction. - Rolling Friction ,

Friction

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