To determine which of the given options is not a scalar, we need to understand the definitions of scalar and vector quantities.
Scalar Quantities: These have only magnitude and no direction. Examples include time, energy, and pressure.
Vector Quantities: These have both magnitude and direction. An example of this is force.
Let's analyze each option:
1. Time: Time is a scalar quantity because it only has magnitude (e.g., 5 seconds) and no direction.
2. Energy: Energy is also a scalar quantity because it only has magnitude (e.g., 100 Joules) and no direction.
3. Pressure: Pressure is a scalar quantity because it only has magnitude (e.g., 101.3 kPa) and no direction.
4. Force: Force is a vector quantity because it has both magnitude (e.g., 10 Newtons) and direction (e.g., to the right).
Given these definitions:
- Time is a scalar.
- Energy is a scalar.
- Pressure is a scalar.
- Force is not a scalar; it is a vector.
Therefore, the option that is not a scalar is:
(d) Force.
