A bob is suspended from a crane by a cable of length l=5m.the crane & load are moving at a constant speed v°.thye crane is stopped by abumper & the bob on the cable swings out an angle of 60°.find the initial speed V°.(g=9.8m/s^2)
neeraj pawar , 14 Years ago
Grade 12
1 Answers
Smit Dama
Last Activity: 7 Years ago
In this question,the cable does not work on the bob.So,the bobs energy is conserved.1/2 mV2 = mgh .......(1)here, h= l cosθ = 5 cos60 = 5/2 .......(2)from equations (1) and (2), we find1/2 mV2 = m×9.8×5/2V2 =49 V=7 m/sec
Provide a better Answer & Earn Cool Goodies
Enter text here...
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Ask a Doubt
Get your questions answered by the expert for free