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What is the scalar product of A = 1i + 2j + 3k and B = 4i + 5j + 6k?

Practice Questions

Q1
What is the scalar product of A = 1i + 2j + 3k and B = 4i + 5j + 6k?
  1. 32
  2. 34
  3. 36
  4. 30

Questions & Step-by-Step Solutions

What is the scalar product of A = 1i + 2j + 3k and B = 4i + 5j + 6k?
  • Step 1: Identify the components of vector A. A = 1i + 2j + 3k means A has components: A_x = 1, A_y = 2, A_z = 3.
  • Step 2: Identify the components of vector B. B = 4i + 5j + 6k means B has components: B_x = 4, B_y = 5, B_z = 6.
  • Step 3: Multiply the corresponding components of A and B. Calculate A_x * B_x = 1 * 4 = 4.
  • Step 4: Calculate A_y * B_y = 2 * 5 = 10.
  • Step 5: Calculate A_z * B_z = 3 * 6 = 18.
  • Step 6: Add the results from Steps 3, 4, and 5 together. 4 + 10 + 18 = 32.
  • Step 7: The final result is the scalar product A · B = 32.
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