Kinematics Question 306
If a vector $ \vec{A} $ is parallel to another vector $ \vec{B} $ then the resultant of the vector $ \vec{A}\times \vec{B} $ will be equal to [Pb. CET 1996]
Options:
A) + 11 J
B) + 7 J
C) + 13 J
D) ? 7 J
Show Answer
Answer:
Correct Answer: B
Solution:
$ W=\overrightarrow{F}.\overrightarrow{s} $
$ =(5\hat{i}+3\hat{j}).(2\hat{i}-\hat{j}) $
$ =10^{-3} $ = $ 7\text{J} $
BETA
