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Category Archives: How fast can things go?
Special Relativity Part 1: From Galileo to Einstein Special Relativity Part 2: Time Dilation and the Twin Paradox Special Relativity Part 3: Length Contraction Special Relativity Part 4: Mass-Energy Equivalence or E = mc² General Relativity: The Curvature of Spacetime
How can just two rules of Einstein’s 1905 theory of special relativity lead to seemingly paradoxical changes in the perception of time?
Einstein’s classic thought experiment involves sitting on a train travelling at the speed of light. If you hold a mirror in front of your face, will you see your reflection in a mirror? How could light from your face reach … Continue reading
If you were driving at the speed of light and turned on your headlights, what would happen?
For shear terror, you have to watch this clip from the Diamond Maruti Car Circus in Delhi So how does a car drive around in a horizontal circle? Well for a start, friction is needed to keep the car form … Continue reading
During the school holidays I enjoyed a trip to the circus. All good fun & always there’s some Physics! The highlight for me was the Globe of Death – three motorbikes riding in circles in a spherical cage. (Something like … Continue reading
Energy, Work, Gravitational potential energy, Kinetic energy, Work calculations, Ramps, Energy transformations, Elastic potential energy, Efficiency, Power. Download the notes. Download the video.