Question

7. What is the mark and unit of work?

Answer 1

Answer:

See below ~

Explanation:

Defining Work :

Work is the energy used in applying a force to displace an object. It is defined as the dot product of force and displacement. Depending on the direction, it is classified as :

1. Positive work
2. Negative work
3. Zero work

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Units of Work :

By deriving the units of Force and Displacement respectively, we will get:

• Work = Newton (N) x meter (m)
• Work = Newton meter (Nm)

Although Nm is the common standard unit for Torque, the standard unit for work is Joules (J).

It has many other units as well, namely :

• erg
• Horsepower (HP)
• Foot-pound
• Kilo-watt hour (kWh)

Answer 2

• When an amount of force applied on a object forces the object to create some displacement then that's called work done .
• Work done can be negative also on special cases .

The unit of work is Joules (J)

Work has general formula

• W=Force ×Distance

When there is an angle included the formula becomes

• W=FdcosØ