Questions
Shown in the figure is rigid and uniform one meter long rod AB held in horizontal position by two strings tied to its ends and attached to the ceiling. The rod is of mass ‘m’ and has another weight of mass 2m hung at a distance of 75cm from A. The tension in the string at A is
detailed solution
Correct option is B
Rotational equilibrium.Taking torque about point B =0TA100=mg50+2mg25 ⇒TA=mgTalk to our academic expert!
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A 198 cm tall girl lies on a light (massless) board which is supported by two scales one under the top of her head and one beneath the bottom of her feet (Figure). The two scales read respectively 36 and 30 kg. What distance is the centre of gravity of this girl from the bottom of her feet?
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