what is the meaning of the term work in physics?

Answer 1

work done = force x displacement x cos(A)

the angle (A) is defined as the angle between the force and the displacement vectors

Answer 2

W = Fs; where work = W (Joule), F = force (N), and s = distance (m); where F is just the force acting in the direction of s, so, if the thing moving is on an inclined ramp, only the force acting to move the mass the s distance along the ramp counts in the equation.

The direction along an inclined ramp is typically calculated as cos(theta), where theta is the angle between the incline and the horizontal. Thus, f = Fcos(theta), where f is the force along the ramp and F is the total force on the body that's being moved. We can see that, when the ramp is lying flat (theta = 0), we have f = Fcos(0) = F. In any case, the complete work equation is W = Fs cos(theta) to account for an incline.

Lessons to learn here: there is no work if a body is not moved. Energy may be spent, but there is no work unless that mass moves. For example, if you push against a wall and (presuming you have no super powers) the wall does not move, you are not working. Your muscles are spending energy to exert the force on that wall, but still there is no work by definition.

Answer 3

W = Fs; where work = W (Joule), F = force (N), and s = distance (m); where F is just the force acting in the direction of s, so, if the thing moving is on an inclined ramp, only the force acting to move the mass the s distance along the ramp counts in the equation.

The direction along an inclined ramp is typically calculated as cos(theta), where theta is the angle between the incline and the horizontal. Thus, f = Fcos(theta), where f is the force along the ramp and F is the total force on the body that's being moved. We can see that, when the ramp is lying flat (theta = 0), we have f = Fcos(0) = F. In any case, the complete work equation is W = Fs cos(theta) to account for an incline.

Lessons to learn here: there is no work if a body is not moved. Energy may be spent, but there is no work unless that mass moves. For example, if you push against a wall and (presuming you have no super powers) the wall does not move, you are not working. Your muscles are spending energy to exert the force on that wall, but still there is no work by definition.

Answer 4

Work In Physics Definition

Answer 5

In physics, work is defined as a force acting upon an object to cause a displacement. There are three key words in this definition - force, displacement, and cause. In order for a force to qualify as having done work on an object, there must be a displacement and the force must cause the displacement. There are several good examples of work which can be observed in everyday life - a horse pulling a plow through the fields, a father pushing a grocery cart down the aisle of a grocery store, a freshman lifting a backpack full of books upon her shoulder, a weightlifter lifting a barbell above her head, a shot-put launching the shot, etc. In each case described here there is a force exerted upon an object to cause that object to be displaced.

Answer 6

A basic definition without any variables would be:

Work is a force applied over a distance

So work would be the measure over a certain distance (d), that a force (F) is applied

W=Fxd
Not just force times d, but actually Force times the dot product of the distance, which means the force parrallel to the direction of the distance.

Answer 7

In Physics we are having various forms of energies like thermal energy, light energy, electrical energy, nuclear energy etc.

The mechanical energy is different from all these energies.

Whatever be the forms of energies, by the principle of conservation of energy, the loss of energy in one system is always equal to the gain of energy of another system

There are various equations to find the loss or gain of energy in each form of energy.

The loss or gain of MECAHNICAL energy is termed as WORK in Physics.

Work is found by the product of force multiplied by the distance in the direction of fore (displacement).

In every day life if a man is holding a heavy weight in his hand we say he is doing some work.

But in Physics he is not doing any work, because no force is moved through any distance.

However he is spending some energy and there are methods to calculate the energy he has spent.

When any form energy is converted into mechanical energy then we can always find a force involved and its displacement and hence we can calculate the work or mechanical energy involved.

Answer 8

Definition of work done = magnitude of displacement times the force in the same direction as the displacement

equation
work done = force x displacement x cos(A)

the angle (A) is defined as the angle between the force and the displacement vectors

well thats what i think anyway

Answer 9

Work is said to be done when a force moves an object in the direction of the force

Answer 10

Work is equal to the force applied on an object multiplied by the length that it is moved over. (If they are in opposite directions, the work is negative). Work is the change in energy of an object. With some forces, like gravity, this simply means the potential energy which has been converted to kinetic energy.

Other forces, like friction, don't have potential energy associated with them, and so the kinetic energy that an object has is converted into heat as it is slowed by friction(negative work in this case).

The word work is also used in thermodynamics to refer to energy that is not associated with heat. This is somewhat inconsistant with its meaning in classical mechanics, because work is supposed to refer to a process, not the energy associated with the process.

However, in thermodynamics, it refers to energy that is capable of doing work (which is all energy except for thermal (heat) energy.)

Answer 11

When a object is moved the energy is required to move it.

The work is done and the energy is spent.

Work is = Energy spent.

A object at rest stays at rest unless compelled by some external force(Newton law of motion).

In British system it is Distance multiplied by weight of the body.

So 1 pound is moved through 1 foot then it is 1 foot pound.

It is same in metric system but units are metric.

ie Gram.Centimetre, gram meters, kilogram. meters...........