- Question Answer
- What is Impulsive Tension . Explain the case of impulsive tension when One end of the string is fixed
. What is Impulsive Tension . Explain the case of impulsive tension when One end of the string is fixed
When a string jerks, equal and opposite tensions act suddenly at each end. Consequently equal and opposite impulses act on the object to which the two ends of the string are attached.
One end of the string is fixed
The impulse which acts at the fixed end of the string cannot change the momentum of the fixed object. The object attached to the free end however will undergo a change in momentum in the direction of the string. The momentum remains unchanged in a direction perpendicular to the string where no impulsive force act. When one end of a string is fixed and other end is connected to a small particle. Fig
Let J be an external impulse imparted to the particle in the direction shown in the figure. Resolving the impulse J , along and normal to the string , we have , component along the string = J cos and component normal to the string = J sin , then J' = J cos ( since the particle cannot move along the string) This impulse, is transmitted through the string , towards the massive support. However , owing to the large mass of the support the impulse , cannot affect , its movement. The particle flies off, normal to the string , with a momentum J sin .