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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The efficiency of the lifting machine is

0.55
0.5
0.4
0.3

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Applied Mechanics and Graphic Statics
A Second's pendulum gains 2 minutes a day. To make it to keep correct time its length

Is not changed but weight of the bob is decreased
Must be decreased
Is not changed but weight of the bob is increased
Must be increased

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Applied Mechanics and Graphic Statics
If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is moving downwards, the acceleration of the lift, is

g/3
g/4
g/2
g/5

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Applied Mechanics and Graphic Statics
The ratio of kinetic energy and potential energy of a simple harmonic oscillator, at a displacement equal to half its amplitude is given by

0.12569444444444
0.084027777777778
0.043055555555556
0.042361111111111

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Applied Mechanics and Graphic Statics
A simple pendulum of length 1 has an energy E when its amplitude is A. If its amplitude is increased to 2A, the energy becomes

E
E/2
4E
2E

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Applied Mechanics and Graphic Statics
A ball of mass 1 kg moving with a velocity of 2 m/sec collides a stationary ball of mass 2 kg and comes to rest after impact. The velocity of the second ball after impact will be

1.0 m/sec
Zero
0.5 m/sec
2.0 m/sec

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