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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 boy can throw a stone up to a maximum height of 10 m. The maximum horizontal distance that the boy can throw the same stone up to will be

  • 20 square root of 2m
  • 10 m

  • 10 square root of 2 m
  • 20 m


D.

20 m

Maximum speed with which the boy can throw stone is
straight u space equals space square root of 2 gh end root
space equals space square root of 2 space straight x 10 straight x 10 end root
space equals 10 square root of 2 space straight m divided by straight s
Range is maximum when projectile is thrown at angle of 45o, Thus,
straight R subscript max space equals space fraction numerator straight u squared over denominator straight g space end fraction space equals space fraction numerator left parenthesis 10 square root of 2 right parenthesis squared over denominator 10 end fraction space equals space 20 space straight m

Maximum speed with which the boy can throw stone is
straight u space equals space square root of 2 gh end root
space equals space square root of 2 space straight x 10 straight x 10 end root
space equals 10 square root of 2 space straight m divided by straight s
Range is maximum when projectile is thrown at angle of 45o, Thus,
straight R subscript max space equals space fraction numerator straight u squared over denominator straight g space end fraction space equals space fraction numerator left parenthesis 10 square root of 2 right parenthesis squared over denominator 10 end fraction space equals space 20 space straight m

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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 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 vector quantity?

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