# What is m and L in physics?

The mass of each little piece is: dm = λ dx, where λ is the mass per unit length of the rod. λ = M/L, where M is the rod’s total mass.

## What does J stand for in physics?

joule. [ jōōl, joul ] The SI derived unit used to measure energy or work. One joule is equal to the energy used to accelerate a body with a mass of one kilogram using one newton of force over a distance of one meter. One joule is also equivalent to one watt-second.

## What is L in moment of inertia?

Moment of inertia of a rod whose axis goes through the centre of the rod, having mass (M) and length (L) is generally expressed as; I = (1/12) ML2. The moment of inertia can also be expressed using another formula when the axis of the rod goes through the end of the rod.

## What does i and j mean in physics?

• ‘i’ is the horizontal component. • ‘j’ is the vertical component.

## What m means in physics?

Mass (symbolized m) is a dimensionless quantity representing the amount of matter in a particle or object. The standard unit of mass in the International System (SI) is the kilogram (kg).

## What is r in physics force?

The size of a frictional force is given by F, start subscript, f, end subscript, is less than or equal to, mu, R,Ff≤μR where R is the magnitude of the normal reaction force between the two surfaces and μ is the coefficient of friction between the two surfaces.

## What is N in waves?

sound waves In sound: Fundamentals and harmonics. Here n is called the harmonic number, because the sequence of frequencies existing as standing waves in the string are integral multiples, or harmonics, of the fundamental frequency.

## What does F mean in physics?

F = force m = mass a = acceleration Newton’s Second Law.

## What does λ mean in physics?

Wavelength is usually denoted by the Greek letter lambda (λ); it is equal to the speed (v) of a wave train in a medium divided by its frequency (f): λ = v/f. wavelength.

## What is Little E in physics?

electron charge, (symbol e), fundamental physical constant expressing the naturally occurring unit of electric charge, equal to 1.602176634 × 10−19 coulomb.

## What is l with a line through it?

Ł or ł, described in English as L with stroke, is a letter of the Polish, Kashubian, Sorbian, Belarusian Latin, Ukrainian Latin, Wymysorys, Navajo, Dëne Sųłıné, Inupiaq, Zuni, Hupa, Sm’álgyax, Nisga’a, and Dogrib alphabets, several proposed alphabets for the Venetian language, and the ISO 11940 romanization of the Thai …

## How do you type a curved l?

You can type 2113 and press Alt+X or open the Symbol dialog (Insert | Symbols | Symbol | More Symbols… and find it in the Letterlike Symbols character subset. Was this reply helpful?

## Who made the letter L?

The 12th LETTER of the Roman ALPHABET as used for English. It originated in the Phoenician letter lamed, adopted into GREEK as lambda (ʌ), which became the Roman letter L.

## What is the moment of inertia of a rod of length L?

The moment of inertia of a rod of length ‘l’ about an axis passing through its centre of mass and perpendicular to rod is ‘I’. The moment of inertia of hexagonal shape formed by six such rods, about an axis passing through its centre of mass and perpendicular to its plane will be. No worries!

## How do I calculate inertia?

Translational Inertia = ma, where “m” is the mass, and “a” is the acceleration of the object. Calculate the rotational inertia or the moment of inertia by multiplying the mass of the object with square of the distance between the object and the axis, the radius of rotation.

## Which way is i and j?

Unit Vectors The unit vector in the direction of the x-axis is i, the unit vector in the direction of the y-axis is j and the unit vector in the direction of the z-axis is k.

## Why do vectors use i and j?

i is the unit vector in the horizontal direction, in the positive horizontal direction. If you want to go the other way, you would multiply it by a negative. And j is the unit vector in the vertical direction.

## What does i stand for in vectors?

1 Answer. Wataru. Oct 23, 2014. In the x,y-plane, they stand for the standard unit vectors. ⎧⎨⎩→i=(1,0)→j=(0,1)

## What is the P in physics?

Momentum is a measurement of mass in motion: how much mass is in how much motion. It is usually given the symbol p.

## What unit is energy?

Joule (J). This is the basic energy unit of the metric system, or in a later more comprehensive formulation, the International System of Units (SI).

## What are the 7 types of forces?

• Applied Force.
• Gravitational Force.
• Normal Force.
• Frictional Force.
• Air Resistance Force.
• Tension Force.
• Spring Force.

## What is R in gravity?

The equation for universal gravitation thus takes the form: where F is the gravitational force acting between two objects, m1 and m2 are the masses of the objects, r is the distance between the centers of their masses, and G is the gravitational constant.

## What are the 3 formulas in physics?

The three equations are, v = u + at. v² = u² + 2as. s = ut + ½at²

## What is Y in wave?

In general, the moving “hump”, wave, is a two-variable function mathematically described as y(x,t)=f(x−vt) where x is the propagated distance from some arbitrary reference point so that x=0 when t=0, t is the elapsed time, y is the vertical displacement at location x at t instant t, and v is the velocity of the “hump” …