equal A bar AB of weight 100N is hanged at point A and a force F is acting at B as shown in the figure. The force F will be minimum when B (a) = 60° (c) O = 45° (b) = 300 (d) = 900 2m 100N 2m А re
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चमकी बल्ब में कौन सी दवा इस्तेमाल
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