Kinematics Question 267
Question: A force $ \overrightarrow{F}=(5\hat{i}+3\hat{j}) $ Newton it’s applied over a particle which d it’splaces it froM is origin to the point $ \overrightarrow{r}=(2\hat{i}-1\hat{j}) $ metres. The work done on the particle is [MP PMT 1995]
Options:
A) ? 7 J
B) +13 J
C) +7 J
D) +11 J
Correct Answer: C $ W=\vec{F}.\vec{r}=(5\hat{i}+3\hat{j})(2\hat{i}-\hat{j})=10-3=7 $ J.
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