For measuring the speed of the pulse through a string. The jerk gives to be string be light or strong?

If, in Exercise 5.21, the speed of the stone is increased beyond the maximum permissible value, and the string breaks suddenly, which of the following correctly describes the trajectory of the stone after the string breaks :- the stone flies off tangentially from the instant the string breaks.

If, in Exercise 5.21, the speed of the stone is increased beyond the maximum permissible value, and the string breaks suddenly, which of the following correctly describes the trajectory of the stone after the string breaks :- the stone flies off at an angle with the tangent whose magnitude depends on the speed of the particle ?

A kite is movgin horizontally at the height of 151.5 metres. If the speed of the kite is 10m/s, how fast is the string being let out, when the kite is 250 m away from the key who is flying the kite ? The height of the boy is 1.5 m.

A kite is moving horizontally at a height of 141.5 m. If the speed of kite is 10 m/s, how fast is the string being let out when the distance (direct) between the kite and the boy (who is flying it) is 250 m? The height of the boy is 1.5 m.

Precise measurements of physical quantities are a need of science. For example, to ascertain the speed of an aircraft, one must have an accurate method to find its positions at closely separated instants of time. This was the actual motivation behind the discovery of radar in World War II. Think of different examples in modern science where precise measurements of length, time, mass etc. are needed. Also, wherever you can, give a quantitative idea of the precision needed.

A string of mass 2.50 kg is under a tension of 200 N. The length of the stretched string is 20.0 m. If the transverse jerk is struck at one end of the string, how long does the disturbance take to reach the other end?