ï»¿ A particle starting from the origin (0,0) moves in a straight line in the (x,y) plane. Its coordinates at a later time are Â (Â ). The path of the particle makes with the x -axis an angle of: from Physics Motion in A Plane Class 11 Manipur Board

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A particle starting from the origin (0,0) moves in a straight line in the (x,y) plane. Its coordinates at a later time are Â (Â ). The path of the particle makes with the x -axis an angle of:

• 30o

• 45o C

• 60o C

• 00

C.

60o C

The slope of the path of the particle gives the measure of angle required.

Draw the situation as shown. OA represents the path of the particle starting from origin O (0,0). Draw a perpendicular from point A to X- axis. Let path pf the particle makes and angleÂ Î¸ with the x -axis, thenÂ

tanÂ Î¸ = slope of line OA

The slope of the path of the particle gives the measure of angle required.

Draw the situation as shown. OA represents the path of the particle starting from origin O (0,0). Draw a perpendicular from point A to X- axis. Let path pf the particle makes and angleÂ Î¸ with the x -axis, thenÂ

tanÂ Î¸ = slope of line OA

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Give three examples of scalar quantities.

Mass, temperature and energy
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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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Give three examples of vector quantities.

Force, impulse and momentum.
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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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