Zigya Logo

Chapter Chosen

Motion in A Plane

Book Chosen

Physics Part I

Subject Chosen

Physics

Book Store

Download books and chapters from book store.
Currently only available for.
CBSE Gujarat Board Haryana Board

Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12
Two projectiles are projected from the ground simultaneously with speeds 30 m/s and 20 m/s at angle 60o and 30o with the horizontal in the same direction. Find the maximum distance between them on ground where they strike. 

Horizontal range is given by, 

 straight R subscript 1 space equals space straight u subscript 1 squared over straight g space sin space 2 straight theta subscript 1 space
space space space space space equals space open parentheses 30 close parentheses squared over 10 sin space 2 space straight x space 60 to the power of straight o space

space space space space space space equals space 90 space straight x space square root of 3 divided by 2 space equals space 45 square root of 3 space straight m space

straight R subscript 2 space equals space straight u subscript 2 squared over straight g space sin space 2 straight theta subscript 2 space

space space space space space equals space fraction numerator left parenthesis 20 right parenthesis squared over denominator 10 end fraction straight x space sin space 2 space straight x space 30 to the power of straight o space

space space space space equals space 20 space square root of 3 space straight m space

therefore space straight R subscript 1 space minus space straight R subscript 2 space equals space space 45 square root of 3 space straight m space minus 20 space square root of 3 space straight m space space

space space space space space space space space space space space space space space space space space space space space space equals space 25 square root of 3 space straight m space

This is the required maximum distance between the two projectiles when they strike the ground. 

96 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 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 vector quantities.

Force, impulse and momentum.
865 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 Views

What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.
1212 Views