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.
A mass of $2\, kg$ suspended with thread $AB$ (figure). Thread $CD$ of the same type is attached to the other end of $2\, kg$ mass. if the lower thread is pulled with a jerk, what happens ?
Two persons are holding a rope of negligible weight tightly at its ends so that it is horizontal. A $15\, kg$ weight is attached to the rope at the mid-point, which now no longer remains horizontal. The minimum tension required to completely straighten the rope is
Write different type of common forces.
An $80\, kg$ person is parachuting and is experiencing a downward acceleration of $2.8\, m/s^2$. The mass of the parachute is $5\, kg$. The upward force on the open parachute is ........... $N$ (Take $g = 9.8\, m/s^2$)
For given systen ${\theta _2}$ ....... $^o$