Mechanics

Physical quantities are those quantities which can be measured.Basically there are two types of physical quantities (Base quantities or fundamental quantities) and (Derived quantities). These are quantities that are used to describe the laws of physics. Physical quantities may be divided into six categories. Constant or ratio Such quantities have the only magnitude, for example, refractive index, dielectric constant and ...

What does motion mean? “A body is said to be in motion,if it changes its position with respect to its surroundings.” Surroundings are the places in its neighborhood where various objects are present.The state of rest or motion of a body is relative.For example,a passenger sitting in a moving bus is at rest because he is not changing his position ...

What is Pascal’s Law and how do we use it? An external force applied on the surface of a liquid increases the liquid pressure at the surface of the liquid. This increase in liquid pressure in transmitted equally in all directions and to the walls of the container in which it is filled. This result is called Pascal’s principle which ...

Earth is the third planet of our solar system.Everyone want to learn about the earth.For this I have written a blog post for you in which we will learn about mass of earth. If you want to calculate the mass of the earth,then stay with us for few minutes. Let’s see: How to calculate the mass of earth? Consider a ...

Centripetal force definition “The force which is directed towards the centre of circle is called centripetal force.” Explanation: Consider a body moving with uniform speed in a circular path.In this case velocity changes only in direction and not in magnitude.Applying Newton’s first law of motion we find that some external force must be acting on the particle.Without presence of external ...

The angle between two vectors is referred as a single point, known as the shortest angle by which we have to move around one of the two given vectors towards the position of co directional with another vector.It is found by using the definition of the dot product of two vectors. How to find Angle b/w two vectors? We can find ...

Newton’s law of gravitation can be stated as:”Everybody in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.” Newton went a step further in his analysis of gravity. In his examination of the orbits of the planets, he ...

Vernier caliper is an instrument used to measure the length, diameter, radius etc. It can measure up to 1/10 of mm (or 0.1 mm 0.01 cm) which is called at least count of V.C.It is used by the lathe mechanic for making metallic cylinders of different sizes. There are two scales of V.C Vernier scale Main scale The main scale ...

What is gravitational acceleration? Acceleration of a freely falling bodies is called gravitational acceleration.The value of gravitational acceleration is 10 ms-².   Why value of g varies with altitude? Above formula shows that the value of acceleration due to gravity g depends on the radius of the earth at its surface.The value of g is inversely  proportional to the square ...

Centre of mass and centre of gravity are often considered same terms,but actually they are two different terms.If you want to learn different between center of mass and center of gravity then you are at the right place.So,stay with us for few minutes. Centre of mass of a system is such a point where an applied force causes the system to ...