Q.1
In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics?
Q.2
One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The tension in the string is
Q.3
If ‘l’ is the span of a light suspension bridge who’s each cable carries total weight (w) and the central dip is ‘y’, the horizontal pull at each support, is
Q.4
The centre of gravity of a quadrant of a circle lies along its central radius at a distance of
Q.5
If the angular distance, 0 = 2t³ ‑ 3t², the angular acceleration at t = 1 sec. is
Q.6
‘μ’ is coefficient of friction. A wheeled vehicle travelling on a circular level track will slip and overturn simultaneously if the ratio of its wheel distance to the height of its centroid, is
Q.7
The unit of moments in M.K.S system, is
Q.8
On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts
Q.9
For a given velocity of a projectile, the range is maximum when the angle of projection is
Q.10
A 50 kg boy climbs up a 8 m rope in gymnasium in 10 sec. The average power developed by the boy is approximately
Q.11
A ball is dropped from a height of 2.25 m on a smooth floor and rises to a height of 1.00 m after the bounce. The coefficient of restitution between the ball and the floor is
Q.12
If g1 and g2 are the gravitational accelerations on two mountains A and B respectively, the weight of a body when transported from A to B will be multiplied by
Q.13
For the given values of initial velocity of projection and angle of inclination of the plane, the maximum range for a projectile projected upwards will be obtained, if the angle of projection is
Q.14
Two parallel forces 20 kg and 15 kg act. In order that the distance of the resultant from 20 kg force may be the same as that of the former resultant was from 15 kg, the 20 kg force is diminished by
Q.15
A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is
Q.16
In a lifting machine a weight of 5 kN is lifted through 200 mm by an effort of 0.1 kN moving through 15 m. The mechanical advantage and velocity ratio of the machine are respectively
Q.17
In SI units, the units of force and energy are respectively
Q.18
Lami's theorem states that
Q.19
The maximum frictional force which comes into play, when a body just begins to slide over the surface of a another body, is known
Q.20
In case of S.H.M. the period of oscillation (T), is given by
Q.21
The angular speed of a car taking a circular turn of radius 100 m at 36 km/hr will be
Q.22
It is observed that in a certain sinusoidal oscillation, the amplitude is linearly dependent on the frequency f. If the maximum velocity during the oscillation is V, then V must be proportional to
Q.23
A funicular polygon cannot be made to pass through
Q.24
A particle is dropped from the top of a tower 60 m high and another is projected upwards from the foot of the tower to meet the first particle at a height of 15.9 m. The velocity of projection of the second particle is
Q.25
A ball moving with a velocity of 5 m/sec impinges a fixed plane at an angle of 45° and its direction after impact is equally inclined to the line of impact. If the coefficient of restitution is 0.5, the velocity of the ball after impact will be
Q.26
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
Q.27
The units of inertia of mass are
Q.28
A body is said to move with Simple Harmonic Motion if its acceleration, is
Q.29
The resultant of two forces ‘P’ and ‘Q’ acting at an angle ‘θ’, is
Q.30
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 resultant may be represented in magnitude and direction by
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