Physics - NLM Question with Solution | TestHub
A heavy ball is suspended as shown. A quick jerk on the lower string will break that string but a slow pull on the lower string will break the upper string. The first result occurs because: [3]
Options:
Answer:
Solution:
When the lower string is given a quick jerk, the required change in momentum of the ball is large but the time is extremely short.
Because of its inertia the heavy ball cannot accelerate downward appreciably in that tiny interval, so the extra tension is not transmitted to the upper string; the lower string alone takes the jerk and breaks.
With a slow pull, the tension has time to transmit through the ball, and the upper string carries the ball's weight plus the applied pull, so it breaks first.
The first result occurs because the ball has inertia. Correct option: (C).
