Work is a _______________; so a \"+\" or \"-\" sign on a work value indicates wh

Question

Work is a _______________; so a "+" or "-" sign on a work value indicates what?____________

a. vector; the direction of the work

b. scalar; the direction of the work

c. vector; whether the work adds or removes energy from the object

d. scalar; whether the work adds or removes energy from the object

a. vector; the direction of the work

b. scalar; the direction of the work

c. vector; whether the work adds or removes energy from the object

d. scalar; whether the work adds or removes energy from the object

Explanation / Answer

Work W is calculated with the formula W=F(dot)d [where F is the force applied and d is the displacement in the direction of force], it is a scalar product of two vectors, namely, force and displacement. so work is a scalar quantity.

Hence option (d) is correct.

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