Question

A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your solution

Answer 1

Hint: When a force pushes anything over a distance, it is said to be doing work. Multiplying the force by the distance travelled in the direction of the force yields the energy transferred, or work done. Work done = force x distance travelled in the force's direction Equals energy transferred.

Complete step by step solution:
Work is the energy delivered to or from an item by applying force along a displacement in physics. It is frequently expressed as the product of force and displacement in its simplest form. When applied, a force is said to produce positive work if it has a component in the direction of the point of application's displacement. If a force has a component that is opposite the direction of displacement at the point of application, it produces negative work.
When a force is applied to an item, work is said to be completed. Work is usually measured in terms of the force exerted, whereas energy is measured in terms of other elements such as heat.
Gravity's work is completely dependent on the vertical displacement of the body.
It does not rely on the body's trail.
As a result, the work done by gravity is represented by the formula W=m g h.
Where,
Vertical displacement,\[h\text{ }=\text{ }0\]
\[W=\text{ }m\times g\times zero\]
\[W\text{ }=\text{ }0\]
As a result, the work done on the body by gravity is zero.

Note: The joule (J), named for 19th-century English scientist James Prescott Joule, is the SI unit of work. It is defined as the work necessary to exert a force of one newton through a displacement of one metre. The dimensionally equivalent newton-metre (Nm) is occasionally used as a unit of work measurement, however this should not be confused with the torque measurement unit. The SI authority discourages the use of Nm because it might cause misunderstanding as to whether a number represented in newton metres is a torque measurement or a work measurement.