Question

What is work?

Answer 1

Hint:In many ways, the scientific concept of work differs from its ordinary connotation. Work's relationship to energy is revealed by the definition of work in physics – whenever work is done, energy is transmitted. A force must be exerted and displacement must occur in the direction of the force for work to be done in a scientific sense. Here we are going to learn about the meaning of work clearly.


 Complete step by step solution:
Work is the product of the component of force in the displacement direction and the magnitude of the displacement.
Explanation:
Work is defined in physics as a force that causes an item to move (or be displaced). Work is the scalar product of the force acting on an item and the displacement induced by that force in the case of a constant force. Even though both force and displacement are vector quantities, work has no direction since a scalar product (or dot product) in vector mathematics has no direction. Because a constant force integrates to the product of force and distance, this statement is consistent with the true definition.
Work can be stated mathematically as follows:
$$W=(F\cos \theta )\times d=F\times d$$
Where,
$$W$$-Work done by the force.
$$F$$-Force,
$$d$$-Displacement caused by the force
$$\theta$$-Angle is formed by the force vector and the displacement vector.
Work has the same dimension as energy and is denoted as, $[M{L}^2{T}^{-2}]$
$$Joule$$- work measurement unit.

Note:
Examples of Work:
In everyday life, there are several examples of work. A horse driving a plow across the field; a father pushing a supermarket cart down an aisle of a grocery store; a student hoisting a rucksack full of books on her shoulder; a weightlifter raising a barbell above his head; and an Olympian launching the shot-put are just a few examples.
In general, for work to occur, a force must be applied to an item, causing it to move. So, a frustrated man pushing against a wall to exhaust himself isn't doing any work because the wall isn't moving. A book falling off a table and landing on the ground, on the other hand, would be considered work, at least in terms of physics, because a force (gravity) acts on the book, causing it to be shifted downward.