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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics
A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is

18° 48'
19° 48'
20° 48'
17° 48'

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Applied Mechanics and Graphic Statics
A system of coplanar forces is in equilibrium when

All the forces are concurrent
Both force polygon" and funicular polygon close
Force polygon closes
Funicular polygon closes

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Applied Mechanics and Graphic Statics
A train weighing 196 tonnes experiences a frictional resistance of 5(11/22) per tonne. The speed of the train at the top of a down gradient 1 in 78.4 is 36 km/hour. The speed of the train after running 1 km down the slope, is

5 √10 m/sec
10 √5 m/sec
3 √5 m/sec
5 √3 m/sec

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Applied Mechanics and Graphic Statics
For perfectly elastic bodies, the value of coefficient of restitution is

Between 0 and 1
0.5
Zero
1

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Applied Mechanics and Graphic Statics
Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centers. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is

43864
43835
43895
43833

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Applied Mechanics and Graphic Statics
Angular acceleration of a particle may be expressed as

Degrees/sec²
Revolutions/sec
All listed here
Radians/sec²

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