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 tension in the string is

19.5 kg
22.5 kg
17.5 kg
25 kg

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Applied Mechanics and Graphic Statics
‘u₁’ and ‘u₂’ are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are ‘v₁’ and ‘v₂’. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by

e = v₁ - v₂/u₂ + u₁
e = v₁ - v₂/u₂ - u₁
e = v₂ - v₁/u₁ - u₂
e = u₂ - u₁/v₁ - v₂

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Applied Mechanics and Graphic Statics
The resolved part of the resultant of two forces inclined at an angle θ in a given direction is

Difference of the forces multiplied by cosine θ°
Algebraic sum of the resolved parts of the forces in the direction
Sum of the forces multiplied by the tangent θ°
Arithmetical sum of the resolved parts of the forces in the direction

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