Question

Define Triangle Law of vector. Explain two methods which reduces friction.

Answer 1

Suppose their is a triangle.

Now imagine we have 2 vectors that form 2 sides of that triangle, such that the head of one is joined to the tail of the other.

The 3rd side of the triangle will represent the resultant of the 2 vectors but in the opposite direction

Answer 2

Hey dear here your
answer ::
$< > < > < > < > < >$

According to the triangle law,::
$- - - - - - - -$

if two vectors acting on a particle at the same time are represented in magnitude and direction by the two sides of a triangle taken in one order,their resultant vector is represented in magnitude and direction by the third side of the triangle taken in opposite order.

Here two vectors are A and B and the resultant C is taken as the above rule

$= = = = = = = = = = =$
METHODS OF REDUCING FRICTION
There are a number of methods to reduce friction in which some are discussed here.

USE OF LUBRICANTS:
The parts of machines which are moving over one another must be properly lubricated by using oils and lubricants of suitable viscosity. 

USE OF GREASE:
Proper greasing between the sliding parts of machine reduces the friction. 

USE OF BALL BEARING:
In machines where possible, sliding friction can be replaced by rolling friction by using ball bearings. 

DESIGN MODIFICATION:
Friction can be reduced by changing the design of fast moving objects. The front of vehicles and airplanes made oblong to minimize friction.

 

Great night ::::