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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................... Thu Jan 13, 2011 1:26 pm

1.a 40 kg slab rests ona frictionless surface with 10 kg resting ovr it.the coefficient of static friction b/w block n slab is 0.6 while kinectic friction is 0.4.the 10 kg slab is acted upon by a haorizontal force of 100N.the acceleration will be
a.0.98
b.1.47
c.1.52
d.6.1

2.a particle of mass m is rotating in a vertical circle.the difference in tension at top and bottom of circle will be
a.6mg
b.4mg
c.2mg
d.0

3.a particle is along a circular path of radius 5 m and uniform speed 5m/s.the average acceleartion when particle completes half revolution
a.0
b.10
c.10*3.14
d.10/3.14

4.at a certain instant of time the mass of rocket is 100kg going vertically upward.if it is ejecting 5kg of gas per second at spped of 400m/s,accleration is
a.20
b.10
c.2
d.1
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Complete IIT AIEEE ICSE ISC PMT help forum :: Physics :: Physics help forum-