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Complete IIT AIEEE ICSE ISC PMT help forum

Complete help forum for students preparing for icse iit aieee cbse pmt and other related exams.Stay updated about all 2011 exams.
 
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rishika01




PostSubject: help me .................. Thu Jan 13, 2011 1:28 pm

.a circular turn table of radius 0.5m has smooth groove along its diameter.a ball of mass 90g is placed inside the groove at distance of 0.1m from the centre and is attached to spring of spring cinstant 100M/cm.other end of spring is fixed to edge of table.on rotating the trun table with constant angular velocity of 100/s,the ball moves away from centre by distance of
a.0.1 m
b.0.01m
c.0.001m
d.0.2m

2.a body of mass m is moving wid velocity v collides head on wid another body of mass 2m which is at rest.the ratio of kinectic enrgy of colliding body before and after collision is
a.1:1
b.2:1
c.4:1
d.9:1
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