Work, Power and EnergyHard

Question

Given below are two statements :

Statement I: An object moves from position $r_{1}$ to position $r_{2}$ under a conservative force field $\overrightarrow{F}$. The work done by the force is $W = - \int_{r_{1}}^{r_{2}}\mspace{2mu}\overrightarrow{F} \cdot \overrightarrow{dr}$.

Statement II : Any object moving from one location to another location can follow infinite number of paths. Therefore, the amount of work done by the object changes with the path it follows for a conservative force.

In the light of the above statements, choose the correct answer from the options given below :

Options

A.Both Statement I and Statement II are true
B.Statement I is false but Statement II is true
C.Statement I is true but Statement II is false
D.Both Statement I and Statement II are false

Solution

Statement-I : Incorrect

Correct equation is $W = \int_{r_{1}}^{r_{2}}\mspace{2mu}\overrightarrow{F} \cdot d\overrightarrow{r}$

Statement-II : Incorrect. Correct Ans-4

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