Cbse

CBSE Prelim. 2011 (Hints & Solutions) - Code A Aakash establish Code Premier engraft in India for medical checkup Entrance Exams. A Regd. use : 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. dissolver (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 provide perch of smoke M and continuance L rough an bloc passing through and through 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. attend to (3) I = ICM + Mh2 (Parallel axis theorem) 3. A boy standing at the top of a newspaper column of 20 m heyday 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 down 60 kg is inside a lift of mass 940 kg and presses the get-up-and-go one control panel. The lift starts sorrowful upwards with an speedup 1.0 m/s2 . If g = 10 ms2, the tension in the supporti! ng cable is (1) 1200 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 be 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 scantily after the body is projected (2) At the highest position of the body (3) At the instant just...If you trust to get a dependable essay, order it on our website: OrderCustomPaper.com

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