Class 12 Vector Algebra · Short Answer2 Marksunit_vectors
Class 12 Maths · Vector Algebra · Short Answer #104
Find all magnitude-5 vectors parallel to the resultant of (2,3,−1) and (1,−2,1).
✅ Step-by-Step Solution
Final Answer: ±5(3,1,0)/√10
- The resultant is s=(3,1,0).
- Its norm is √10, so its two parallel unit directions are ±s/√10.
- Multiply by 5: ±5(3,1,0)/√10.
📋 CBSE Stepwise Marking Scheme
- [0.5 marks] The resultant is s=(3,1,0).
- [1 mark] Its norm is √10, so its two parallel unit directions are ±s/√10.
- [0.5 marks] Multiply by 5: ±5(3,1,0)/√10.
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