Explanation

• Hooke’s law states that stress is directly proportional to strain within the elastic limit.
• It defines the proportionality range between stress and strain.
• Beyond this limit, permanent deformation occurs.

Last verified on 11-11-2026

Explanation

• Capillary action is the rise or fall of a liquid in a narrow tube.
• It results from surface tension and adhesive and cohesive forces.

Last verified on 11-11-2026

Explanation

• The unit of pressure is N/m² (Newton per square meter).
• It is also called Pascal (Pa).
• Pressure means force applied per unit area.
• Higher force or smaller area increases pressure.

Last verified on 17-06-2026

Explanation

The SI unit of momentum is kg·m/s (or N·s). In brief:

• Definition: Momentum is the product of mass and velocity (p = mv).
• Formula: p = mv
• Vector: has magnitude and direction
• Conservation: constant in closed systems
• No named unit
• Measured in kilograms (kg) and velocity in meters per second (m/s). 
• The dimensional formula of momentum is:[M L T⁻¹]
• Momentum is the product of an object’s mass and its velocity → Momentum = Mass × Velocity.
• It is a vector quantity.

Explanation

Work formula: W = F x d x cosθ

Perpendicular means angle = 90°

cos 90° = 0

So W = 0

Last verified on 11-11-2026