Applied Mechanics and Graphic Statics
One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The reaction between the sphere and the wall of the arrangement made is

110 kg
108.5 kg
105.5 kg
102.5 kg

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Applied Mechanics and Graphic Statics
A body is said to move with Simple Harmonic Motion if its acceleration, is

Proportional to the distance from the point of reference and directed towards it
Always directed away from the centre, the point of reference
Proportional to the square of the distance from the point of reference
Inversely proportion to the distance from the point of reference

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