Cbse

CBSE Prelim. 2011 (Hints & Solutions) - Code A Aakash bring in Code Premier plant in India for medical checkup Entrance Exams. A Regd. agency : Aakash Tower, fleck zero(prenominal)-4, Sec-11, MLU, Dwarka, New Delhi-110075 Ph.: 011-47623456 Fax : 011-47623472 HINTS & SOLUTIONS for CBSE previous 2011 by Aakash Institute The dimensions of (?0 ?0 ) ? 1 2 1. are ? ?1 1 ? 2 2 (1) ?L T ? ? ? ? ? (3) [L1T] Sol. resolvent (4) condition expression is that of speed of light. 2. (2) ? 1 ?1 ? ?L2 T 2 ? ? ? ? ? [LT1] (4) The secondment of inertia of a thin unvaried perch of volume M and duration L somewhat an bloc passing by dint of its midpoint and perpendicular to its length is I0. Its moment of inertia about an axis passing through nonpareil of its ends and perpendicular to its length is (1) I0 + ML2 (2) I0 ? ML2 2 (3) I0 ? ML2 4 (4) I0 + 2ML2 Sol. settle (3) I = ICM + Mh2 (Parallel axis theorem) 3. A boy stand ing at the top of a newspaper column of 20 m whirligig drops a stone. Assuming g = 10 ms2, the velocity with which it hits the ground is (1) 5.0 m/s (3) 20.0 m/s Sol. Answer (3) v ? 2gh ? 2 ? 10 ? 20 = 20 m/s Aakash Institute - Regd. Office: Aakash Tower, Plot No. 4, Sector-11, MLU, Dwarka, New Delhi-75 Ph.

: 47623456 Fax: 47623472 (1) (2) (4) 10.0 m/s 40.0 m/s Aakash Institute CBSE Prelim. 2011 (Hints & Solutions) - Code A 4. A person of mount 60 kg is inside a lift of mass 940 kg and presses the get-up-and-go one control panel. The lift starts paltry upwards with an speedup 1.0 m/s2. If g = 10 ms2, t he tension in the supporting cable is (1) 12! 00 N (3) 9680 N (2) (4) 8600 N 11000 N Sol. Answer (4) T = (M + m) (g + a) = (940 + 60) (10 + 1) = 11000 N 5. A eubstance project vertically from the earth reaches a height equal to earths radius earlier returning to the earth. The power exerted by the gravitational force is superior (1) At the instant dependable after the body is projected (2) At the highest position of the body (3) At the instant just...If you trust to get a skillful essay, order it on our website: OrderCustomPaper.com

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