Have you ever wondered how a spacecraft can escape the gravitational pull of a planet and travel into space? Escape Velocity is the minimum speed an object needs to move away from a celestial body without requiring any additional propulsion after reaching that speed. For Earth, the Escape Velocity is approximately 11.2 km/s, or about…
Bernoulli’s principle explains how pressure, velocity, and elevation are related in a moving fluid. It is one of the fundamental concepts in fluid mechanics and helps explain fluid flow through pipes, pressure changes in narrow passages, the operation of Venturi meters, and several effects used in aerodynamics. The principle is based on the conservation of…
Archimedes’ principle: buoyant force F = ρ_fluid × V_displaced × g. Why objects float or sink, worked examples with ships and submarines, and how to find density.
Angular momentum L = Iω (rotating body) or L = mvr (orbiting particle). Conservation explained with the spinning skater, gyroscopes, and Kepler’s second law.
Acceleration: a = Δv/Δt explained. Uniform and non-uniform acceleration, free fall g = 9.8 m/s², v-t graphs, and worked examples. Complete guide.
Motion problems can look complicated when several quantities are changing at the same time. An object may have an initial velocity, accelerate for several seconds, travel a certain distance, and reach a different final velocity. The SUVAT equations provide a simple way to connect these quantities when acceleration is constant. The name SUVAT comes from…
Breaking projectile motion into horizontal and vertical components, with derivations for range, max height and time of flight — plus 4 worked examples.
When an object is pulled by a rope, cable, or string, the rope transmits a force to the object. This pulling force is called tension force. It appears in many everyday situations, from lifting objects with cables to hanging masses from strings and analyzing pulley systems. The tension force acts along the length of a…
Vectors have magnitude and direction; scalars have magnitude only. Vector addition, resolving components, resultant force, and 4 worked examples for A-Level physics.
Why does a thrown ball follow a curved path instead of moving in a straight line? The answer comes from the combination of horizontal motion and vertical motion under gravity. When air resistance is ignored, these two components combine to produce a mathematical curve called a parabola. The question why is projectile motion a parabola…
