Laws of MotionHard
Question
A string is wrapped round a log of wood and it is pulled with a constant force F as shown in the figure.
Options
A.tension T in the string increases with increase in θ
B.tension T in the string decreases with increase in θ
C.tension T > F if θ > π/3
D.tension T > F if θ > π/4
Solution
F = 2 T cos θ T = 
θ↑ cos θ↓T↑
on increasing θ, cos θ decreases and hence T increases.
Create a free account to view solution
View Solution FreeMore Laws of Motion Questions
A block A is placed a long rough plank B of same mass as shown in figure . The plank is placed over a smooth horizontal ...If block A is moving with an acceleration of 5 m/s2, the acceleration of B w.r.t ,ground is...Two bodies A (30 Kg) and B (50 Kg) tied with a light string are placed on a friction less table.A force F acting at B pu...A cork and a metal bob are connected by a string as shown in the figure. If the beaker is given an acceleration towards ...Two masses of 1 kg and 5 kg are attached to the ends of a massless string passing over a pulley of negligible weight. Th...