Laws of MotionHard
Question
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 :
Options
A.15 kg
B.15/2 kg
C.2 kg
D.Infinitely large (or not possible)
Solution
T cosθ + T cosθ − 150 = 0 [Equilibrium of point A]
2 T cosθ = 150 T =
When string become straight θ becomes 90o
⇒ T = ∞
Create a free account to view solution
View Solution FreeMore Laws of Motion Questions
A system is shown in the figure. A man standing on the block is pulling the rope. Velocity of the point of string in con...Gravel is dropped into a conveyer belt at a rate of 0.5 kg/s. The extra force required in newton to keep the belt moving...Figures I,II,III and IV depicts variation of force with time...As show in figure, the block rests on a table at distance from the edge while the right block is kept at the same level ...A tuning fork of known frequency 256 Hz makes 5 beats per second with the vibrating string of a piano. The beat frequenc...