# Civil Engineering Applied Mechanics Quiz – Set 23

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## Q1. Equation of motion of a point in a straight line, is

(A) v = u + ft
(B) S = ut + ½ ft2
(C) 2fS = v2 – u2
(D) All the above

(A) 30°
(B) 45°
(C) 60°
(D) 75°

## Q3. Pick up the correct statement from the following:

(A) If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities
(B) 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
(C) If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles
(D) All the above

(A) kg.m/sec
(B) kg.m/sec
(C) kg.m/sec2
(D) kg.m/sec

(A) Period time
(B) Oscillation
(C) Beat
(D) Amplitude

(A) Weight
(B) Mass
(C) Inertia
(D) Momentum

(A) 437.5 cm4
(B) 337.5 cm4
(C) 237.5 cm4
(D) 137.5 cm4

(A) 2 sec
(B) 3 sec
(C) 4 sec
(D) 5 sec

(A) 1.00 m/sec
(B) 1.57 m/sec
(C) 3.14 m/sec
(D) 6.28 m/sec

## Q10. On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts

(A) Downwards at its upper end
(B) Upwards at its upper end
(C) Perpendicular to the wall at its upper end
(D) Zero at its upper end

Answer: (D) Zero at its upper end

(A) Zero
(B) 0.5 m/sec
(C) 1.0 m/sec
(D) 2.0 m/sec

## Q12. Pick up the correct statement from the following. The kinetic energy of a body

(A) Before impact is equal to that after impact
(B) Before impact is less than that after impact
(C) Before impact is more than that after impact
(D) Remain constant

Answer: (C) Before impact is more than that after impact

## Q13. A Seconds pendulum executes

(A) 0.5 beat per second
(B) 1.0 beat per second
(C) 2.0 beats per second
(D) 2.5 beats per second

Answer: (C) 2.0 beats per second

## Q14. The centre of gravity of a plane lamina will not be at its geometrical centre if it is a

(A) Circle
(B) Equilateral triangle
(C) Rectangle
(D) Right angled triangle

(A) 2 t
(B) 5.8 t
(C) 0.2 t
(D) 3.5 t