Question

What is the positive negative and zero work done? Explain with the help of formula.
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Answer 1

Answer:

Positive work done – The work done is said to be positive when force and displacement are in the same direction. Hence, work is positive. Zero work – the work done is said to be zero when force and displacement are perpendicular to each other. ... Hence, work is negative.

Answer 2

Explanation:

Positive work done – The work done is said to be positive when force and displacement are in the same direction.

θ=0∘F→⋅r→=FrcosθF→⋅r→=Frcos0∘F→⋅r→=FrW=F→⋅r→=Fr

Zero work – the work done is said to be zero when force and displacement are perpendicular to each other.

θ=90∘F→⋅r→=FrcosθF→⋅r→=Frcos90∘F→⋅r→=0W=F→⋅r→=0

Hence, work is zero