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Option 3 : Plane angle
The correct answer is the Plane angle.
- The physical quantity for the expression of arc/radius is the Plane angle.
- A plane angle is well known: one full revolution is 360° or 2π radians.
- Plane angle- usually refers to an angle in a 2-dimensional figure like a square, triangle, circle, etc.
- Solid angle usually refers to an angle in a 3-dimensional figure like a cube, cuboid, sphere, etc.
- Linear momentum
- Linear momentum is the vector quantity and is defined as the product of the mass of an object, m, and its velocity, v.
- The linear momentum formula is given by, P = m v, where m=mass, v= velocity.
- The units of linear momentum are kg m/s.
- Surface tension
- Surface tension can be defined as the property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of the water molecules.
- Surface tension, represented by the symbol γ (alternatively σ or T), is measured in force per unit length.
- Its SI unit is newton per meter and the cgs unit of dyne per centimetre.
- Velocity
- Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt).
- Velocity is represented by the equation v = Δs/Δt.
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