At the bottom of it's motion because the gravitational potential energy is zero
At the lowest point in its swing.
Frictionlist pendulum is an example of the pendulum of a clock, a reversible process, free.
A pendulum moves not by Earth's rotation, but by gravity pulling down and causing it to swing.
According to the mathematics and physics of the simple pendulum hung on a massless string, neither the mass of the bob nor the angular displacement at the limits of its swing has any influence on the pendulum's period.
Is law catalyst for starting the pendulum swinging? or is ethics? politics?
The kinetic energy, when the pendulum is at a distance x metres from its central position is 0.5*m*q2*(p2 - x2), Newtons where m is the mass of the pendulum, assumed to be concentrated at the bottom, q is given by q = 2pi/period, p is the amplitude of the pendulum.
A swinging pendulum is moving fastest at the lowest point of its arc. That is the point where all its potential energy has been converted into kinetic energy, and it is the only point in a pendulum's arc where that happens. See related link (a simulation).
This could be quantified using calculus, but to simply know WHERE it is fastest but not how fast, simple first principals are all that is required - that of conservation of energy. At the low point the pendulum has it's least Potential Energy (PE) - it has fallen as far as it can. As it rises it gains PE, gathering that energy by reducing the Kinetic Energy (energy of motion) of the mass. Clearly the pendulum is traveling fastest at the bottom.
making timings by sighting the bob past a fixed reference point (called a 'fiducial point')Sighting the bob as it moves fastest past a reference point. The pendulum swings fastest at its lowest point and slowest at the top of each swing.· The bob of the pendulum was displaced with a small angle· The amplitude of the oscillation of a simple pendulum is small.· The simple pendulum oscillates in a vertical plane only.· Switch off the fan to reduce the air resistance
At the bottom of it's swing. This is because it has accelerated to it's peak velocity due to gravity.
When it is exactly at its lowest point; the point where it is closest to the ground. Before that point it is accelerating; after that point it is decelerating.
Potential energy is the greatest at the top of the pendulum swing, precisely as it is stopped. Kinetic energy is greatest at the bottom of its swing as it is moving its fastest. Between the two points the energies are converting into one another.
At this point, at the top of the swing, the pendulum has potential energy. As it drops it loses potential and gains kinetic energy. At the fastest point, as the pendulum reached the bottom of the swing, it has kinetic energy. It then loses kinetic energy and gains potential energy as it swings up to the other side.
Compound pendulum is a physical pendulum whereas a simple pendulum is ideal pendulum. The difference is that in simple pendulum centre of mass and centre of oscillation are at the same distance.
A shorter pendulum has a shorter period. A longer pendulum has a longer period.
The longer the length of the pendulum, the longer the time taken for the pendulum to complete 1 oscillation.
bifilar pendulum
maybe it is a pendulum