Applied Mechanics and Graphic Statics
When a body of mass M1 is hanging freely and another of mass M2 lying on a smooth inclined plane(α) are connected by a light index tensile string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by

g(M2 + M1 sin α)/(M1 + M2­) m/sec²
g(M1 + M2 sin α)/(M1 + M2­) m/sec
g(M1 - M2 sin α)/(M1 + M2­) m/sec²
g(M2 × M1 sin α)/(M2 - M1­) m/sec²

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Applied Mechanics and Graphic Statics
Periodic time of body moving with simple harmonic motion, is

Directly proportional to its angular velocity
Inversely proportional to the square of its angular velocity
Inversely proportional to its angular velocity
Directly proportional to the square of its angular velocity

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

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