What was Aristotle’s view regarding motion ? How it was wrong ? What is flow in his argument ?
Greek Philosopher, Aristotle due to his experience in day to day life assumed that to continue uniform motion of the body some external agency (Force) is required. This is called Aristotle's law. According to him an arrow released from bow continue its motion because air behind the arrow pushes it forward.
Aristotle's mistake was that he considered practical experience in form of a basic argument. Frictional force oppose motion of solid object whereas viscous force oppose motion of fluid. Hence, to continue uniform motion of object force is to be applied by external parameter. Aristotle's mistake was that he considered day to day life experience as fundamental law of nature.
Two masses $m$ and $M$ are attached to the strings as shown in the figure. If the system is in equilibrium, then
Block $A$ of mass $4 \;kg$ is to be kept at rest against a smooth vertical wall by applying a force $F$ as shown in figure. The force required is .......... $N$ $\left(g=10 m / s ^2\right)$
An object of mass $5\, kg$ is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of $10\, N$ throughout the motion. The ratio of time of ascent to the time of descent will be equal to $\left[\right.$Use $g =10 \,ms ^{-2}]$
A uniform beam of weight $W$ is attached to a vertical wall by a hinge $H$ . The beam is held horizontal by a rope as shown below. Which one of the following best shows the direction of the reaction force $R$ at the hinge ?