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2. Newton's cradle - Wikipedia

   en.wikipedia.org/wiki/Newton's_cradle

   For example, when two balls are dropped to strike three stationary balls in a cradle, there is an unnoticed but crucial small distance between the two dropped balls, and the action is as follows: the first moving ball that strikes the first stationary ball (the second ball striking the third ball) transfers all of its momentum to the third ball ...

3. Pendulum (mechanics) - Wikipedia

   en.wikipedia.org/wiki/Pendulum_(mechanics)

   A pendulum is a body suspended from a fixed support such that it freely swings back and forth under the influence of gravity. When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back towards the equilibrium position.

4. Pendulum - Wikipedia

   en.wikipedia.org/wiki/Pendulum

   "Simple gravity pendulum" model assumes no friction or air resistance. A pendulum is a device made of a weight suspended from a pivot so that it can swing freely. [1] When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position.

5. Paraconical pendulum - Wikipedia

   en.wikipedia.org/wiki/Paraconical_pendulum

   The defining feature of the "paraconical" or "ball-borne" pendulum is that the pendulum's fulcrum is the changing point of contact between a spherical metal ball and a flat surface on which the ball rests. The pendulum therefore loses energy to rolling friction but not sliding friction, and is able to swing freely in both dimensions (forward ...

6. Cavendish experiment - Wikipedia

   en.wikipedia.org/wiki/Cavendish_experiment

   Cavendish's result provided additional evidence for a planetary core made of metal, an idea first proposed by Charles Hutton based on his analysis of the 1774 Schiehallion experiment. [18] Cavendish's result of 5.4 g·cm −3 , 23% bigger than Hutton's, is close to 80% of the density of liquid iron , and 80% higher than the density of the Earth ...

7. Foucault pendulum - Wikipedia

   en.wikipedia.org/wiki/Foucault_pendulum

   The Foucault pendulum or Foucault's pendulum is a simple device named after French physicist Léon Foucault, conceived as an experiment to demonstrate the Earth's rotation. If a long and heavy pendulum suspended from the high roof above a circular area is monitored over an extended period of time, its plane of oscillation appears to change ...