Civil Engineering :: Applied Mechanics and Graphic Statics
- Two forces act an angle of 120°. If the greater force is 50 kg and their resultant is perpendicular to the smaller force, the smaller force is
- The following is not a law of static friction:
- A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its centre of mass has a speed of 200 mm/sec. The work required to stop the hoop is
- A satellite moves in its orbit around the earth due to
- A satellite goes on moving along its orbit round the earth due to
- A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be
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Two objects moving with uniform speeds are 5 m apart after 1 second when they move towards each other and are 1 m apart when they move in the same direction.
The speeds of the objects are: - Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for
- If a particle moves with a uniform angular velocity ‘ω’ radians/sec along the circumference of a circle of radius ‘r’, the equation for the velocity of the particle, is
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A.
The force of friction always acts in a direction opposite to that in which the body tends to move |
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B.
The force of friction is dependent upon the area of contact |
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C.
The force of friction depends upon the roughness of the surface |
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D.
The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces |