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Force Acting On Multiple Surfaces...

Force Acting On Multiple Surfaces

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With increase of temperature the friction force acting between two surfaces .

If l is the length of an imaginary line drawn on free surface of liquid and F is tangential force acting on it , the surface tension is

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Assertion : Friction always opposes the motion. Reason : Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.

If F is a force acting normally on a surface of area A, then the pressure P is given by

Surface tension is the property of a liquid by virtue of which the free space of the liquid at rest tends to have minimum area and as such it behaves as if covered with a stretched membrane. It is measured as the force acting an unit length of a line imagined to be drawn tangentially anywhere on the free surface of liquid at rest. It acts at right angles to this line on both sides and along the tangent to the liquid surface. When a razor bladed floats on water, then the force of surface tension acts on the circumference of the blade acting tangentially to the liquid surface : (a) True (b) False

Consider the situation as shown in figure, frictional force acting between surface and 3 kg block is