Applied Mechanics and Graphic Statics

281. The ratio of the speed of a rolling cylinder to the speed of sliding cylinder is

1. Less than 1
2. Equal to 1
3. Between 1 and 2
4. Greater than 2

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282. The resolved part of the resultant of two forces inclined at an angle θ in a given direction is

1. Algebraic sum of the resolved parts of the forces in the direction
2. Arithmetical sum of the resolved parts of the forces in the direction
3. Difference of the force multiplied by the tengent θ°
4. um of the forces multiplied by the tengent θ°

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283. The resultant of the forces acting on a body will be zero if the body

1. Rotates
2. Moves with variable velocity in a straight line
3. Moves along a curved path
4. Does not move at all

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284. The resultant of two forces 'P' and 'Q' acting at angle sin 'θ'

1. P² + Q² + 2P sin θ
2. P² + Q² + 2PQ cos θ
3. P² + Q² + 2PQ tan sin θ
4. P² + Q² + 2PQ cos sin θ

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285. The resultant of two forces acting at right angles is 5 kgf and if they act at an angle of 60°, it is 37 kgf. The magnitudes of the forces are:

1. 2 kgf, 3 kgf
2. 3 kgf, 4 kgf
3. 4 kgf, 5 kgf
4. 5 kgf, 3 kgf

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286. The resultant of two forces acting at right angles is kg and acting at 60° is 70 kg. The forces are

1. 1 kg and 4 kg
2. 2 kg and 3 kg
3. kg
4. 3 kg and 5 kg

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287. The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then,

1. P = R
2. Q = R
3. P = Q
4. None of the above is correct

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288. The rotational velocity of a satellite is increased by 450 m per second if its launch is done from equator

1. Eastward
2. Northward
3. Westward
4. Southward

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289. The shape of a suspended cable for a uniformly distributed load over it is

1. Circular
2. Parabolic
3. Catenary
4. Cubic parabola

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290. The shape of a suspended cable under its own weight, is

1. Parabolic
2. Circular
3. Catenary
4. Elliptical

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