Question

5. Write SI unit of work. What is meant by positive work, negative work and
zero work?



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Answer 1

Answer:

The SI unit for work and energy is the joule (J), where 1 J = 1 N ⋅ m = 1 kg ⋅ m2/s2. The work done by a force is zero if the displacement is either zero or perpendicular to the force. The work done is positive if the force and displacement have the same direction, and negative if they have opposite........

Answer 2

Answer:

joule

Explanation:

Positive work: when force and displacement are in the same direction, the work performed on an object is said to be positive work. ... The work is done in this case known as Positive work.

Negative work: Negative work is performed if the displacement is opposite to the direction of the Force applied.

Zero work: When force and displacement are perpendicular to each other, or when force or displacement is zero.