Vectors a and b point the same way with |a| = 3 and |b| = 4. What is |a + b|?
A7
B12
C5
D1
Answer & Solution
Correct answer: A. 7
For vectors in the same direction the magnitudes simply add, giving 3 + 4 = 7.
Related questions
In physics, the acceleration of a point is the time derivative of itsWho, with Heaviside, introduced the dot and cross notation for vector products in 1881?In vector analysis the magnetic field B is classed as aA tetrahedron has three mutually perpendicular edges i, j and k from one vertex. Its volumThe vectors i + j and j + k are adjacent sides of a parallelogram. Its area isFor any vector a, the cross product a × a equalsA vector of magnitude 4 is multiplied by the scalar -3. The magnitude of the result isThe direction cosine of i + j + k along the x-axis is