Ancient civilizations had a high demand for raw materials, like clay, diverse rocks and, most of all, metals. These were required for buildings, crafts, agriculture, their armed forces, financial concerns, art and culture. Clays and rocks produced by opencast mining primarily served for the production of bricks and building blocks, which were used for civil and hydraulic engineering.
(1) The pendulum will have maximum velocity at the lowest point and it will be the most difficult point to stop.
(2) Velocity at maximum height is zero and it will be the easiest point to stop the pendulum.
(3) The total mechanical energy of the pendulum would be the same at all point.
<h3>Point of maximum velocity of the pendulum</h3>
A pendulum has maximum kinetic energy at the lowest point. The kinetic energy is given as;
K.E = ¹/₂mv²
The pendulum will have maximum velocity due to maximum kinetic energy at the lowest point and it will be the most difficult point to stop.
<h3>Point of maximum height of the pendulum</h3>
A pendulum has maximum potential energy at the highest point. The potential energy is given as;
P.E = mgh
Velocity at maximum height is zero and it will be the easiest point to stop the pendulum.
<h3>Conservation of energy</h3>
In absence of friction, the total mechanical energy will be conserved. Thus, the total mechanical energy of the pendulum would be the same at all point.
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For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.
