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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 car travelling at 60 km/h overtakes another car travelling at 42 km/hr. Assuming each car to be 5.0 m long, find the time taken during the overtaking and the total road distance used for the overtake? 

Total distance to be travelled  for overtaking the car = 5.0  +5.0 = 10. 0 m 

Relative velocity of first car w.r.t second car = 60 - 42 = 8 km/hr

     = 8 x 1000/ (60 x 60)

      = 50 m/s

Time taken, t = 10/5 = 2 s.

Road distance used for overtaking = distance travelled by first car in 2 s + length of first car

= [ 60 x 1000 / (60 x60)] x 2+ 5

= 38.33 m


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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

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

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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