﻿ A particle is projected with velocity  at such an angle that it just clears two walls of equal height h which are at a distance 2h from each other. Show that time of passing between the two walls is  from Physics Motion in A Plane Class 11 Manipur Board

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Motion in A Plane

Physics Part I

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A particle is projected with velocity at such an angle that it just clears two walls of equal height h which are at a distance 2h from each other. Show that time of passing between the two walls is Given,

Velocity with which the particle is projected = 2 Height of the wall = h

Distance between the walls = 2h

Let the particle be projected at angle θ.

Time taken by particle to cross the two walls each of height 'h' is equal to difference of instants when it would be at a height h above ground.

The kinematics of motion of particle in vertical direction is given by, That is, is the time of passing between the two walls.

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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.
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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.
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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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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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