Related Questions
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Joule is the unit of
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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
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4
A stone is thrown up a slope of inclination 60° to the horizontal. At what angle to the slope must the stone be thrown so as to land as far as possible from the point of projection?
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A shell travelling with a horizontal velocity of 100 m/sec explodes and splits into two parts, one of mass 10 kg and the other of 15 kg. The 15 kg mass drops vertically downward with initial velocity of 100 m/sec and the 10 kg mass begins to travel at an angle to the horizontal of tan1 x, where x is
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The pole distance is measured in
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A circular disc rotates at n rpm. The angular velocity of a circular ring of same mass and radius as the disc and to have the same angular momentum is
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The member which does not carry zero force in the structure shown in below figure, is
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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
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A heavy ladder resting on floor and against a vertical wall may not be in equilibrium if
A. Floor is smooth and wall is rough
B. Floor is rough and wall is smooth
C. Both floor and wall are rough
D. Both floor and wall are smooth
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If α is the angular acceleration of a compound pendulum whose angular displacement is θ, the frequency of the motion is
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A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight
A. Vertical component of velocity remains constant
B. Horizontal component of velocity remains constant
C. Speed of the ball remains constant
D. Kinetic energy of the ball remains constant
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Energy may be defined as
B. Capacity of doing work
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A sphere is resting on two planes BA and BC which are inclined at 45° and 60° respectively with the horizontal. The reaction on the plane BA will be
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A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The velocity ratio of the lifting machine is
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A particle executes a simple harmonic motion. While passing through the mean position, the particle possesses
A. Maximum kinetic energy and minimum potential energy
B. Maximum kinetic energy and maximum potential energy
C. Minimum kinetic energy and maximum potential energy
D. Minimum kinetic, energy and minimum potential energy
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4
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?
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Force polygon method is applicable for
A. Any coplanar force system
B. A system of parallel forces only
C. Concurrent coplanar force system
D. Non-concurrent coplanar force system
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A disc of mass 4 kg, radius 0.5 m and moment of inertia 3 kgm² rolls on a horizontal surface so that its center moves with speed 5 m/see. Kinetic energy of the disc is
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The angular speed of a car taking a circular turn of radius 100 m at 36 km/hr will be
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If two bodies of masses M1 and M2(M1 > M2) are connected by alight inextensible string passing over a smooth pulley, the tension in the string, will be given by
A. T = g(M1 - M2)/(M1 + M2)
B. T = g(M1 + M2)/(M1 × M2)
C. T = g(M2 - M1)/(M1 + M2)
D. T = g(M2 + M1)/(M2 - M1)
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4
The velocity of a moving body, is
C. A scalar as well as a vector quantity
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The torque produced by a force depends on (i) The magnitude of the force (ii) The direction of the force (iii) The point of application of the force relative to origin The correct answer is
D. All (i), (ii) and (iii)
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A satellite goes on moving along its orbit round the earth due to
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In case of S.H.M. the period of oscillation (T), is given by
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A square hole is made in a circular lamina, the diagonal of the square is equal to the radius of the circle as shown in below figure the shift in the centre of gravity is
A. r (π - 0.75)/(π - 0.5)
B. r (π - 0.25)/(π - 0.75)
C. r (π - 0.5)/(π - 0.75)
D. r (π - 0.5)/(π - 0.25)
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If the angular distance, 0 = 2t3 - 3t², the angular acceleration at t = 1 sec. is
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The unit of Moment of Inertia of a body, is
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The unit of force in C.G.S. system of units, is called
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Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for
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The apparent weight of a man in a moving lift is less than his real weight when it is going down with