ï»¿ A car moves from X to Y with a uniform speed vu and returns to Y with a uniform speed vd. The average speed for this round trip is: from Physics Motion in A Plane Class 11 Manipur Board

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A car moves from X to Y with a uniform speed vu and returns to Y with a uniform speed vd. The average speed for this round trip is:

A.

The average speed of a body in a given time interval is defined as the ratio of distance travelled to the time taken.

Let t1 and t2 be times taken by the car to go from X and Y and then Y to X respectively.

Then,Â

The average speed of a body in a given time interval is defined as the ratio of distance travelled to the time taken.

Let t1 and t2 be times taken by the car to go from X and Y and then Y to X respectively.

Then,Â

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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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Give three examples of vector quantities.

Force, impulse and momentum.
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Give three examples of scalar quantities.

Mass, temperature and energy
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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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