Scalars & Vectors (Addition and Subtraction, Scalar and Vector Products, Unit Vector, Resolution of a Vector)
Scalars & Vectors (Addition and Subtraction, Scalar and Vector Products, Unit Vector, Resolution of a Vector) MCQ Questions
13.
A vector A makes angle θ with the x-axis. Its x and y components are respectively:
ANSWER :
B. A cosθ and A sinθ
14.
A vector has components Ax = 3 m and Ay = 4 m. Its magnitude is:
15.
A unit vector associated with vector A is defined as:
16.
The magnitude of a unit vector is:
D.
Depends on the original vector
17.
A vector A in 3D is given by A = Ax i-hat + Ay j-hat + Az k-hat. Its magnitude is:
ANSWER :
C. sqrt(Ax² + Ay² + Az²)
18.
A vector A makes 120° with the positive x-axis. Its x-component is:
