A vector is a quantity with D. A quantity with magnitude and direction
Explanation:
There are two types of quantity in physics:
- Scalar: a scalar quantity is a quantity having a magnitude only. Examples of scalar quantities are:
Distance
Speed
Time
Energy
...
- Vector: a vector quantity is a quantity having both a magnitude and a direction. This means that it is not enough to specify what is the magnitude of the quantity (the number), but we also need to specify its direction.
Examples of vector quantities are:
Displacement
Velocity
Acceleration
Force
....
So, the correct answer is
D. A quantity with magnitude and direction
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