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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 body is moving with velocity 30 m/s towards east. After 10 s its velocity becomes 40 m/s towards the north. The average acceleration of the body is 

  • 7 m/s2

  • square root of 7 space m divided by s squared
  • 5 m/s2

  • 1 m/s2


C.

5 m/s2

Average space acceleration space equals space fraction numerator Change space in space velocity over denominator Total space time end fraction

straight a space equals space fraction numerator vertical line straight v subscript straight f space minus space straight v subscript straight i vertical line over denominator increment straight t end fraction

equals space fraction numerator square root of 30 squared plus 40 squared end root over denominator 10 end fraction space equals space fraction numerator square root of 900 plus 1600 end root over denominator 10 end fraction
space equals space 5 space ms to the power of negative 2 end exponent
Average space acceleration space equals space fraction numerator Change space in space velocity over denominator Total space time end fraction

straight a space equals space fraction numerator vertical line straight v subscript straight f space minus space straight v subscript straight i vertical line over denominator increment straight t end fraction

equals space fraction numerator square root of 30 squared plus 40 squared end root over denominator 10 end fraction space equals space fraction numerator square root of 900 plus 1600 end root over denominator 10 end fraction
space equals space 5 space ms to the power of negative 2 end exponent
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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. 


814 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 Views

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.
835 Views

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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