Motion in A Plane

Physics Part I

Physics

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What is the displacement of a point on the wheel of radius R initially in contact with ground when the wheel rolls forward half a revolution?

Given,Â

Radius of the wheel = RÂ

When half revolution is made by the wheel, the point of contact moves from point A to C and hence undegoes the displacementÂ Â

Distance displaced by the point of contact, AB = Â

Perpendicular distance traversed by the body = 2R

Therefore, total distance,Â

andÂ Â

Thus the point of contact undergoes the displacement of magnitudeÂ Â making an angleÂ Â with the ground.

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What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.

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What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.

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What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

A quantity must possess the direction and must follow the vector axioms. Any quantity that follows the vector axioms are classified as vectors.Â

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