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how and when we will use i,j,k unit vector in 2d, and 3d how and when we will use i,j,k unit vector in 2d, and 3d
how and when we will use i,j,k unit vector in 2d, and 3d
if there are only 2 unit vectors then it is a 2d problem. if all three are present then it is 3d problem... solve all dimensions differently for example if it is 5i+4j position and the force applied is 10i+10j+10k then also object will move in 2d because j is not present in position vector and hence we will solve x direction and y direction separately using formula.. like if answer is good...
if there are only 2 unit vectors then it is a 2d problem.
if all three are present then it is 3d problem...
solve all dimensions differently
for example if it is 5i+4j position and the force applied is 10i+10j+10k then also object will move in 2d because j is not present in position vector and hence we will solve x direction and y direction separately using formula..
like if answer is good...
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