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Class 10 Class 12

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.

249 Views

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.

814 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.
1212 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 Views