Applied Mechanics And Graphic Statics - Study Mode
[#146] A string of length 90 cm is fastened to two points ‘A’ and ‘B’ at the same level 60 cm apart. A ring weighing 120 g is slided on the string. A horizontal force ‘P’ is applied to the ring such that it is in equilibrium vertically below ‘B’. The value of ‘P’ is:
Correct Answer
(C) 80 g
[#147] A body of weight w placed on an inclined plane is acted upon by a force P parallel to the plane which causes the body just to move up the plane. If the angle of inclination of the plane is $$ heta $$ and angle of friction is $$varphi $$, the minimum value of P, is
Correct Answer
(B) $$frac{{{ ext{w}}sin left( { heta - varphi }
ight)}}{{cos varphi }}$$
[#148] If the linear velocity of a point on the rim of a wheel of 10 m diameter, is 50 m/sec, its angular velocity will be
Correct Answer
(D) 5 rad/sec
[#149] The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is b and the vertical side is a, from its vertical face is
Correct Answer
(A) $$frac{{{{ ext{a}}^2} + { ext{ab}} + {{ ext{b}}^2}}}{{3left( {{ ext{a}} + { ext{b}}}
ight)}}$$
[#150] If two forces of 3 kg and 4 kg act at right angles to each other, their resultant force will be equal to
Correct Answer
(C) 5 kg