ï»¿ A projectile is projected with velocity u at an angle Î¸ with the vertical. At what point velocity and acceleration will be perpendicular to each other? from Physics Motion in A Plane Class 11 Manipur Board

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A projectile is projected with velocity u at an angle Î¸ with the vertical. At what point velocity and acceleration will be perpendicular to each other?

At theÂ highest point the velocity is in horizontal direction and acceleration is in vertically downward direction. Hence,Â velocity and acceleration of projectile are perpendicular to each other at the highest point.Â
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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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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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Give three examples of scalar quantities.

Mass, temperature and energy
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