Science can be fun when demonstrated experimentally. Below are a few fun-filled experiments that help understand certain concepts.
The Anti-gravity wheel
A wheel weighing 19 kg is lifted overhead being held only at one end of a meter long bar attached to it. Though this seems an impossible task, Derek Muller performs this task by using only simple physics. This is done by applying gyroscopic precession which is torque induced precession. The wheel is made in a way that allows the wheel to rotate freely on application of an external force and the wheel rotates on an axis bar. The force applied is in the opposite direction to the axis bar. The wheel and the entire apparatus feels light to the person holding it when enough force is applied.
The Backwards Brain Bicycle
This experiment is a very good demonstration of the ability of the human brain to change and evolve so as to change neural pathways. The experiment actually makes the simple task of riding a bicycle look like a challenging mental task.
The bike is designed in such a way that when the handle bars are steered towards the right the wheel turns towards the left and the other way round. Since the front wheel turns to the opposite direction to where the handle bar is turned the rider fumbles when trying to ride this bike. On riding this bike for a good amount of time, it gets challenging to ride a traditional bike the way it is supposed to be ridden.
The riding of a traditional bike is made easy because of the cerebellum. This area of the brain is responsible for proper motor control, coordination and balance. Most of the automatic activities are controlled by the cerebellum and this is exactly why injury to this part can be alarming throwing the individual off-balance and completely impossible.
The Magnus effect
An effect produced where a spinning ball curves from its path is termed Magnus effect. When balls are hit the Magnus effect works when at the same time a spin is given. Golfers, soccer players use this effect to curve the path of the ball. The effect works in the following manner. When the ball that spins is moving through the air a boundary layer of air clings to the surface and spins along. This layer when moving collides with passing air on one side creating a high pressure area. One the other side the air moves in the same direction and so travels faster creating a low pressure area. This pressure difference creates a lift force called the Magnus force causing the ball to move from high pressure area to low pressure area.