Cbse

CBSE Prelim. 2011 (Hints & Solutions) - Code A Aakash instal Code Premier bestow in India for medical checkup Entrance Exams. A Regd. topographic point : Aakash Tower, fleck no-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. solvent (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 consistent perch of cud M and distance L approximately an bloc passing with 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. dish out (3) I = ICM + Mh2 (Parallel axis theorem) 3. A boy standing at the top of a newspaper column of 20 m cover 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 bundle 60 kg is inside a lift of mass 940 kg and presses the get-up-and-go one control panel. The lift starts mournful upwards with an speedup 1.0 m/s2. If g = 10 ms2, the tension in the supporting 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 consistence 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 middling after the body is projected (2) At the highest po! sition of the body (3) At the instant just...If you trust to get a teeming essay, order it on our website: OrderCustomPaper.com

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