Mechanics

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 mr (or 0.01 mm= 0.001 cm) which is usually called the least count of screw gauge. Parts of micrometer screw gauge It consists of a U-shaped metal frame F with ...

What is the vernier calliper? It 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 least count of Vernier Callipers. Scales of vernier calliper Vernier scale Main scale Main scale is graduated is centimeter while Vernier scale slides along the main scale and is ...

Stopwatch in physics definition A stopwatch is used to measure the time interval of an event. Types of stopwatch Digital stopwatch Mechanical stopwatch 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 is pressed again,it ...

Define scientific notation In scientific notation a number is expressed as some power of ten multiplied by a number between 1 and 10.   What is significant figure? A significant figure is one,which is known to be reasonable and reliable. or All the accurately known digits and first doubtful digit in an expression are called significant figures. Significant figures rules ...

What is physics? The branch of science which deals with the interaction of matter and energy is called physics. Branches of physics list In practical field,the common branches of physics are: Mechanics It is the study of motion of objects,its causes and effects.  Heat It is the study of nature of heat,modes of transfer and effects of heat.  Sound It ...

Newton’s 1st law of motion definition Newton’s first law of motion states that ” A body continues its state of rest or of uniform motion in a straight line provided no net force acts on it.” According to newton’s first law of motion ,a body at rest remains at rest provided no net force acts on it.This part of law ...

What are the three laws of motion? Newton’s first law of motion Newton’s second law of motion Newton’s third law of motion Different types of motion in physics with examples History For centuries the problem of motion and its causes was a central theme of natural philosophy,an early name for what we call physics.It was  not until the time of ...

 What are the differences between scalars and vectors?   Scalars  vectors Physical quantities having magnitude only but no direction are called scalar quantities. Physical quantities having magnitude and direction are called vector  quantities.   Scalar quantities are completely described by: 1:a number 2:a suitable unit vector quantities are completely described by: 1:a numbers 2:by a suitable unit 3:By certain direction ...

What is mechanics in physics? The branch of science that deals with the study of motion of body,its causes and effects. The importance of mechanics It is the oldest of the physical sciences,is the study of the motion of objects.The calculation of the path of a baseball or of a space probe sent to Mars is among its problems,as is ...

A vector is represented graphically by a directed line segment or an arrow head line segment.The length of line,according to the scale chosen ,represents the magnitude of the vector while arrow head indicates the direction.Also they follow triangle law of addition.For example force,acceleration,torque,momentum ,angular momentum etc.To represent a vector we need: A suitable scale Reference axis x,y & z axis ...