InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
An insect crawls from `A` to `B` where B is the centre of the rectangular slant face. Find the (a) initial and final position vector of the insect and (b) displacement vector of the insect. . |
|
Answer» Initial position vector of insect `vec(OA)=2hat(j)+hat(k)(m)` `vec(OB)=3/2hat(i)+hat(j)+1/2hat(k)(m)` Displacement of insect `vec(AB)`= position vector of `vec(B)`-position vector of `vec(A)`. `vec(AB)=(3/2-0)hat(i)+(1-2)hat(j)+(1/2-1)hat(k)=3/2hat(i)-hat(j)-1/2hat(k)(m)` Hence, magnitude of displacement `|vec(AB)|=sqrt((3/2)^(2)+(1)^(2)+(1/2)^(2))=sqrt(9/4+1+1/4)=sqrt(7/2m)`. |
|