rishika01
| Subject: 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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