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 block of mass 2kg is placed on the floor. The coefficient of static friction is 0.4. Force of 2.8N is applied on the b...A cylinder of mass 10 kg is rolling in a plane with an initial velocity of 10m/s. If the coefficient of friction between...When a body is in equilibrium :-...A massless spring balance is attached to 2 kg trolley and is used to pull the trolley along a flat surface as shown in t...A block of unknown mass is at rest on a rough horizontal surface. A force F is applied to the block. the graph in the fi...