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Work

Md. Saifur Rahman

Work

What is work?

If because force-displacement happens then the product of force and component of displacement at the direction of force due to force is work.

Work is the product of applied force on a body and its displacement along the direction of a force.

Unit of work: J (Joule)

Dimension of work, [W] = ML²T^-2

What is Joule?

If due to the appliance of one-newton force at the direction of force the application point of force moves 1 meter then it is 1 joule of work.

What is positive work?

If due to force the application point of force moves along the direction of force or the component of displacement is towards the direction of force then it is said to be work done by force or positive work.

What is negative work?

If due to force the application point of force moves in the opposite direction of force or the component of displacement is at the opposite direction of force then it is said to be work done on force or negative work.

What do you mean by the work 50 J?

The work measuring 50 J means 50 m of displacement of a body towards the direction of a force measuring 1 N. It further means 1 m of displacement of the body toward the direction of a force measuring 50 N.

Secondary Physics

Chapter - 1 : Physical Quantities and Their Measurements
Chapter - 2 : Motion
Chapter - 3 : Force
Chapter - 4 : Work, Power, and Energy
Chapter - 5 : State of Matter and Pressure
Chapter - 6 : Effect of Heat on Matter
Chapter - 7 : Waves and Sound
Chapter - 8 : Reflection of Light
Chapter - 9 : Refraction of Light
Chapter - 10 : Static Electricity
Chapter - 11 : Current Electricity
Chapter - 12 : Magnetic Effects of Current
Chapter - 13 : Modern Physics and Electronics
Chapter - 14 : Physics to Save Life

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