NTA Abhyas JEE Main2020PhysicsLaws of MotionPractice
A block of mass m is pulled by a uniform chain of the same mass m tied to it by applying a force F at the other end of the chain. The tension at the point which is at a distance of a quarter of the length of the chain from the end on which the force is applied, will be
Options
- A3 F 4
- B7 F 8 m
- C6 F 7
- D4 F 5
Correct answer
B. 7 F 8 m
Step-by-step solution
a = N e t   e x t e r n a l   f o r c e   i n   d i r e c t i o n   o f   m o t i o n T o t a l   m a s s   a = F m 1 + m 2 = F 2 m , T = m 1 + 3 4 m 2 a = 7 4 m × F 2 m T = 7 F 8 m