Astronomers are the worst at naming things. Dark energy AND dark matter? Who can remember which is which. But perhaps one astronomer has just fixed it, with a theory that says perhaps actually they are they same stuff.

Challenge question: if 1kg of apples is $5 and 2kg is $10, how much is -1kg of apples? The answer? Priceless. Because you could use negative-mass apples to build warp drives, travel in time, and construct a perpetual motion machine. In...

Mr. Andersen shows you how to draw free body diagrams of various objects. The major forces (like gravity, normal, tension, friction, air resistance, etc.) are discussed and then applied to various problems.

In this video Paul Andersen explains how contact forces result from interatomic forces. The following forces are explained at the interatomic level: normal force, applied force, friction force, tension force, spring force, and buoyant...

This content delves into analyzing forces on an inclined plane, focusing on static and kinetic friction to control the motion of a box. Learn to calculate forces needed to prevent slipping, initiate upward movement, and maintain constant...

This content presents a solved physics problem that calculates the frictional force and acceleration of a 3.5 kg block pushed along a horizontal floor by a 15 N force at a 40° angle to the horizontal. It demonstrates the application of...

Explore Newton's Laws of Motion with this physics problem. Determine if a block slides down a vertical wall when pushed by a horizontal force and calculate the wall's reaction force in unit-vector notation.

This video analyzes the forces and work done on a person being lifted from a cliff, breaking down the process into different stages of motion. Learn how to apply physics principles to understand a real-world rescue

Learn how to calculate force, work done, kinetic energy, and speed of a box being lowered. This video applies the Work-Energy Theorem to a real-world physics problem, ideal for understanding energy transformations.

This content explains the rotational dynamics of a judo foot-sweep, calculating the initial angular acceleration of an opponent. It analyzes the torques produced by both gravity and an applied pull, demonstrating how force placement and...

Understand what makes a force conservative or non-conservative through four clear conditions. Learn how path independence and energy conservation define forces like gravity and contrast with forces like friction.

Learn how gravitational force does positive or negative work to transform an object's kinetic energy during ascent and descent. This Class 11 Physics lesson explains the work-energy theorem through real-life vertical motion scenarios.

This content introduces the concept of torque as the twisting or turning force that causes rotation, explaining its dependence on the applied force and the perpendicular distance from the axis of rotation. It delves into calculating...

Explore Newton’s Second Law of Motion and learn how force, mass, and acceleration are related through F = ma. Includes real-life examples, free body diagrams, and tips to solve Physics problems.

Understand how external and non-conservative forces affect mechanical energy. Learn to apply the work-energy theorem and energy statements for Physics students

Friction is the resistance that one object or surface experiences when moving over another object or surface. The two types of friction that come into play when moving two objects against one another are static and kinetic. Static...

A measure of how much matter an object contains, in units of grams or kilograms.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

Mechanical work is the energy transferred by a force in moving through a distance.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

Vector Man enrols into Ian’s superhero training programme! This lesson will explain how static friction is dependent on the applied force, normal force and roughness of a surface, but independent of apparent contact...

Lotus and Brooke put their skills to the test, but the game is rigged! This lesson will use Hooke’s Law to calculate the extension of a spring when a force is applied.

Definitions included: elastic force, Hooke’s Law,...

Este programa de video de accion en vivo es sobre la palabra Newton. El programa esta disenado para reforzar y apoyar la comprension y retencion por el estudiante de la palabra Newton mediante el uso de secuencias de video, fotografias,...

Friction is the resistance that one object or surface experiences when moving over another object or surface. The two types of friction that come into play when moving two objects against one another are static and kinetic. Static...

In this live-action program viewers will learn A free body diagram is a simple diagram that shows the magnitude and direction of all the forces that are acting upon an object or body in any given situation.

Students will come to...

More spinning things! Records, and wheels, and doors, and other fun things. The equations that govern this kind of motion are just like the ones we learned in kinematics, except they have different symbols. Lots of funky Greek letters in...