Applied Mechanics and Graphic Statics
The tension in a cable supporting a lift

Is less when the lift is moving upwards
Is less when the lift is moving downwards
Remains constant whether its moves downwards or upwards
Is more when the lift is moving downwards

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Applied Mechanics and Graphic Statics
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 ‘θ’ and angle of friction is ‘φ’, the minimum value of ‘P’, is

w sin (φ - θ)/cos φ
w sin (θ - φ)/cos φ
w cos (θ + φ)/cos φ
w sinθ cos(θ - φ)/sin φ

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

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