1. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either
Correct answer: (D)
all the above are correct
2. The maximum frictional force which comes into play when a body just begins to slide over another surface is called
Correct answer: (A)
limiting friction
3. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly
Correct answer: (B)
62.5 m
4. A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to
Correct answer: (C)
Wtan(a + <|))
5. A cable with a uniformly distributed load per horizontal meter run will take the following shape
Correct answer: (B)
parabola
6. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to
Correct answer: (B)
50
7. A force acting on a body may
Correct answer: (E)
all of the above.
8. A force is completely defined when we specify
Correct answer: (D)
all of the above
9. A framed structure is perfect if it contains members equal to
Correct answer: (A)
2n-3
10. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if
Correct answer: (C)
the floor and wall both are smooth surfaces