Questions
Two masses of I kg and 5 kg are attached to the ends of a massless string passing over a pulley of negligible weight. The pulley itself is attached to a light spring balance as shown in figure. The masses start moving during this interval; the reading of spring balance will be:
detailed solution
Correct option is B
Suppose T be the tension in each part of the string passing over the pulley. Iis given by:T = 2m1m2gm1+m2 = 2×1×51+5g = 53gFor equilibrium of the pulley there is an upward force of 2T acting on the string joining the pulley to the spring. Therefore, reading of spring balance will be 2T = 103 Kgf . So reading will be 103 kgf which is less than 6 kgf .Talk to our academic expert!
Similar Questions
Two blocks of masses m = 5 kg and M = 10 kg are connected by a string passing over a pulley B as shown. Another string connects the centre of pulley B to the floor and passes over another pulley A as shown. An upward force F is applied at the centre of pulley A. Both the pulleys are massless. The accelerations of blocks m and M, if F is 300 N are (Take, g = 10 )
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests