Applied Mechanics and Graphic Statics

191. Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultantmay be represented in magnitude and direction by

1. Its longer side
2. Its shorter side
3. The diagonal of the parallelogram which does not pass through the point of intersection of the forces
4. The diagonal of the parallelogram which passes through the point of intersection of the forces

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192. Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for

1. Half oscillation
2. Quarter oscillation
3. Complete oscillation
4. None of these

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193. Periodic time of body moving with simple harmonic motion, is

1. Directly proportional to its angular velocity
2. Directly proportional to the square of its angular velocity
3. Inversely proportional to the square of its angular velocity
4. Inversely proportional to its angular velocity

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194. Pick up the correct statement from the following for the structure shown in below figure.

1. The horizontal reaction at A t
2. The horizontal reaction at C t
3. The vertical reaction at A is zero
4. All the above

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195. Pick up the correct statement from the following. A rubber ball when strikes a wall rebounds but a lead ball of same mass and velocity when strikes the same wall, falls down

1. Rubber and lead balls undergo equal changes in momentum
2. Change in momentum suffered by lead ball is less that of rubber ball
3. Momentum of rubber ball is less than that of lead ball
4. None of these

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196. Pick up the correct statement from the following. The kinetic energy of a body

1. Before impact is equal to that after impact
2. Before impact is less than that after impact
3. Before impact is more than that after impact
4. Remain constant

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197. Pick up the correct statement from the following:

1. If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities
2. If a sphere impinges directly on an equal sphere which is at rest, then a fraction ½(1 - e2) the original kinetic energy is lost by the impact
3. If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles
4. All the above

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198. Pick up the incorrect statement from the following. In a simple harmonic motion

1. Velocity is maximum at its mean position
2. Velocity is minimum at the end of the stroke
3. Acceleration is minimum at the end of the stroke
4. Acceleration is zero at the mean position

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199. Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature,

1. Dip of the cable increases
2. Length of the cable increases
3. Dip of the cable decreases
4. None of these

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200. Pick up the incorrect statement from the following:

1. The C.G. of a circle is at its centre
2. The C.G. of a triangle is at the intersection of its medians
3. The C.G. of a rectangle is at the intersection of its diagonals
4. The C.G. of a semicircle is at a distance of r/2 from the centre

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