Q. If the angle between the applied force and the direction of motion of a body, is between 90° and 180°, the work done, is called

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Q. The units of moment of inertia of an area, are

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Q. To avoid bending action at the base of a pier,

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Q. Lami's theroem states that

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

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Q. If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along

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Q. For lifting a load of 50 kg through a distance of 2.5 cm, an effort of 12.5 kg is moved through a distance of 40 cm. The efficiency of the lifting machine, is

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Q. Power can be expressed as

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Q. A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be

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Q. The resolved part of the resultant of two forces inclined at an angle θ in a given direction is

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Q. The following statement is one of the laws of Dynamic friction

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Q. A 50 kg boy climbs up a 8 m rope in gymnasiam in 10 sec. The average power developed by the boy is approximately

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Q. According to Law of Triangle of Forces

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Q. A Second's pendulum gains 2 minutes a day. To make it to keep correct time its length

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Q. The following is not a law of static friction :

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Q. The velocity of a moving body, is

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Q. The resultant of the forces acting on a body will be zero if the body

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Q. 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

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Q. A pilot flies a small plane in a vertical loop of radius r. At the top of its trajectory he experiences weightlessness. If the acceleration due to gravity is g, the speed of the plane at the top of its trajectory would be

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Q. A Seconds pendulum executes

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