MECHANICAL ENGINEERING APPLIED MECHANICS MCQs

A man is standing near the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platform will decrease if he

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Two forces of 6 and 8 kg act at right angles to each other, the resultant force will be

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The forces which meet at one point but their lines of action do not lie in one plane, are called

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A particle is moving in Simple Harmonic Motion in a simple pendulum with some period of oscillation. Now in order to double the period of oscillation

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A bob of simple pendulum oscillating in air is made to oscillate in oil. The time period will

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A ball weighing 250 gm is thrown vertically upwards with a velocity of 980 cm/sec. The time that the ball will take to return back to earth would be

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A particle in simple Harmonic Motion while passing through mean position will have

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A jet engine works on the principle of

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A body in Simple Harmonic Motion will attain maximum velocity when it passes through

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

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The necessary condition of equilibrium of a body is

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When a body moves round a fixed axis it will have

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A rigid body is suspended vertically at a point and oscillates with a small amplitude under the action of the force of gravity. Such an arrangement is called

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The motion of a bicycle wheel is

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A cannon of weight 10 tonnes fires a shell of 50 kg with a muzzle velocity of 900 m/sec at an angle of 30?. The time taken for the shell to emerge from the barrel is 0.004 sec. The velocity of the cannon would be

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A body of weight W is resting at a plane inclined at 30? to the horizontal. It is attached to a string making an angle of 60? with horizontal. If the angle of friction be 30? the tension in the string would be

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The earth's gravitational force field is said to be conservative force field because

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The tension in the wire rope supporting a lift moving with a uniform velocity

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The maximum frictional force which comes into play when a body just begins to slide over the surface of another body is known as

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The angle of friction is

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The coefficient of friction is

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The shape of a suspended cable under its own weight is

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The angular acceleration of a flywheel decreases uniformly from 8 rad/sec2 to 2 rad sec2 in 6 sec at which time its angular velocity is 42 rad/sec. The initial angular velocity was

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The slope on the road generally provided on the curves is known as

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The radius of gyration of a solid sphere of radius r is equal to

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The statement the resultant of the external forces applied to a body (rigid or non-rigid) composed of a system of particles is equivalent to the vector summation of the effective forces acting on all particles-is known as

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If two bodies one light and one heavy have equal kinetic energies, which one has a greater momentum?

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A force F = 2i + 3j - k is passing through the origin. Its moment about point (1, 1, 0) is

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The law of conservation of mechanical energy is valid

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The weight of an object will be maximum when it is placed at

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A particle in SHM while passing through mean position will have

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The torque acting on a system is zero. Which of the following will be conserved?

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If a gymnast sitting on a rotating stool, with his arms outstretched suddenly lowers his arm

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The excape velocity for the moon is nearly

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If three non-parallel forces hold a rigid body in equilibrium, they must

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A flywheel 200 cm in diameter is rotating at 100 rpm. A point on the rim of the flywheel will not have

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If w is the angular velocity of the pulley and T1 and T2 are tensions of driving and driven side then power transmitted equals

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A bullet is fired vertically upwards with a velocity of 2200 ft/s. Bullet ascends to a height of

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Which of the following bearing will have least coefficient of friction

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If a gymnast sitting on a rotating stool, with his arms outstretched suddenly lowers his arm

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Secondary stresses may be set up in frame due to any of the following reasons EXCEPT :

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