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Motion in A Plane

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Physics Part I

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Physics

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
A bullet fired from a gun with a velocity of 800 ft/s strikes the ground at the same level as the gun at a distance of 17320 ft. Find the angle of inclination with the horizontal at which the gun was fired.

Given that,

Distance of the gun, R = 17320 ft

Initial velocity, u = 800 ft./sec

Horizontal range is given by,

                   straight R equals fraction numerator straight u squared space sin space 2 straight theta over denominator straight g end fraction

Therefore,

sin space 2 straight theta space equals space Rg over straight u squared

space space space space space space space space space space space space equals space fraction numerator 17320 space cross times space 2 over denominator left parenthesis 800 right parenthesis squared end fraction

space space space space space space space space space space space space equals space 0.866

rightwards double arrow2 straight theta space equals space 60 degree

rightwards double arrow  straight theta space equals space 30 degree, is the angle of inclination with the horizontal at which the gun was fired. 

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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. 


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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.
1212 Views

Give three examples of scalar quantities.

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

Force, impulse and momentum.
865 Views

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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