Write a paragraph that explains the difference between work in the everyday sense and the scientific definition of work

The work done in physics and the work done in our day to day life is different from each other.

As per the scientific definition of work, the work is said to be done on or by the body if the force has a component along the direction of displacement of the body.

Mathematically work[W] = FS  where F is the force and S is the displacement.

If the force is not along the direction of the displacement and it has some component along displacement,the work done W = FScosФ  where Ф is the angle between them.

From above it is obvious that the work done will be zero if-

[1] The body will be at rest.

[2] The force acts perpendicular to the displacement of the body.

In our day to day life, the work done is different from scientific work done. For instance, a gate keeper is paid as he performs his duty i.e his work. He comes early morning and leaves for his home at 10 p.m. In everyday sense, he did his work and he is paid for it. But if we consider his work scientifically, then work will be zero as he only sits on his chair.The displacement of the body is zero.

When a person lift our bag on his head and starts moving, he is paid for it. But scientifically the work done by him is zero. It is so because the weight of the bag is downward and his displacement is in forward direction.Hence force is perpendicular to the displacement which means the work done must be zero.

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: