Home » Mechanics (page 3)

Mechanics

Dimensional analysis physics examples and practice problems

Dimensional analysis definition All the physical quantities can be expressed in terms of seven fundamental quantities.The powers to which these fundamental physical quantities be raised are termed as “dimensions”.Using the method of dimensions called dimensional analysis. Each base quantity is considered a dimension expressed by specific symbol written within square brackets.It stands for qualitative nature of physical quantity.For example different ...

Read More »

Difference between dot product and cross product in tabular form

 dot product Vs cross product   Dot product or scalar product  Cross product or vector product If the product of two vectors is a scalar quantity,the product is called scalar product or dot product. If the product of two vectors is a vector quantity then the product is called vector product or cross product. The dot product is defined by ...

Read More »

conservative Vs non conservative forces with examples

What are conservative forces? Those  forces which allows the opportunity of two way conversion among potential and kinetic energies are said to be conservative forces. examples conservative forces Gravitational forces Magnetic force Electrostatic force Elastic spring force Electric force what are non conservative forces? The force is called non conservative if work is done by the force is dependent on ...

Read More »

Artificial gravity : Definition,formula and exam

artificial gravity definition Weightlessness in space crafts or satellites is highly convenient to an astronaut in many ways.For Example he can not drink in it.It is very difficult for him to perform experiments. In order to overcome these difficulties an artificial gravity is created in the space craft by spinning it around its own axis so that normal force of ...

Read More »

Relation between power force and velocity in physics

How is power related to force and velocity? It is some time convenient to express power in terms of constant force (F) acting on an object moving at constant velocity “V” . For example when the propeller of motor boat causes the water to exert constant force on the boat,it moves with constant velocity v .The power delivered by motor ...

Read More »

Difference between instantaneous and average power formula

Power definition The rate of doing work is called power. From the statement of work it is not clear that same amount of work done in one second or in 1 hour.The rate at which work done is often interest in practical applications. Power formula physics Average power formula The ratio of total work to the total time is called ...

Read More »

First equation of motion in physics

First equation of motion derivation Consider a body is moving with initial velocity “Vi” with uniform acceleration “a” as shown in figure.After time “t” its velocity becomes “Vf”.The total distance covered by a body is under the straight line AB which is shaded as shown in figure.The slope of line AB is acceleration “a”.1st equation of motion can be obtained ...

Read More »

micrometer screw gauge measurement with least count formula

What is the micrometer screw gauge? It is an instrument used to measure diameter of thin wires, thickness of small sheets of glass,plastic etc. It can measure upto 1/10 of mm (or 0.01 mm= 0.001 cm) which is usually called the least count of screw gauge. Parts of screw gauge It consists of a U-shaped metal frame F with a ...

Read More »

Stopwatch:How to read digital and analog stopwatch?

Stopwatch in physics definition A stopwatch is used to measure the time interval of an event. Types of stopwatch Digital stopwatch Mechanical stopwatch How to read Digital stop watch? It is commonly used in laboratories,it can measure a time interval up to 0.01 second.It starts to indicate the time lapsed as the start/stop button is pressed.As soon as start/stop button ...

Read More »

Scientific notation and significant figures

 Scientific notation definition In scientific notation a number is expressed as some power of ten multiplied by a number between 1 and 10. A simple and scientific method to write small or large numbers is to express them in some power of 10.The distance of moon from Earth is 384000000 meters.This is large number,it can also be expressed as 3.84×10 8 m.This ...

Read More »