Following are some of the multiple choice questions on the **Applied Mechanics** with answers that will help the students in developing their knowledge.

## Applied Mechanics MCQ

### 2. One Joule is equivalent to

### 3. One Newton is equivalent to

### 4. The tension in a cable supporting a lift

### 5. Effect of a force on a body depends upon its

### 6. The motion of a bicycle wheel is

### 7. Work may be defined as

### 8. The force polygon representing a set of forces in equilibrium is a

### 9. On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts

### 10. 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 efficiency of the lifting machine is

### 11. A square hole is punched out of a circular lamina, the diagonal of the square being the radius of the circle. If r is the radius of the circle, the C.G. of the remainder from the corner of the square on the circumference will be

### 12. Pick up the correct statement from the following. The kinetic energy of a body

### 13. The vertical reaction at the support ‘A’ of the structure shown in below figure, is

### 14. 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?

### 15. The centre of gravity of the trapezium as shown in below figure from the side is at a distance of

### 16. The member which does not carry zero force in the structure shown in below figure, is

### 17. A cable loaded with 0.5 tonne per horizontal metre span is stretched between supports in the same horizontal line 400 m apart. If central dip is 20 m, the minimum tension in the cable, will be

### 18. Time period and length of a second’s pendulum respectively are

### 19. The angles between two forces to make their resultant a minimum and a maximum respectively are

### 20. The Law of Polygon of Forces states that

### 21. A system of coplanar forces is in equilibrium when

### 22. Minimum pull in a suspended cable with supports at two ends is equal to

### 23. The following statement is one of the laws of Dynamic friction

### 24. The dimensions of Gravitational Universal constant ‘G’ are

### 25. The centre of gravity of a quadrant of a circle lies along its central radius at a distance of

### 26. If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is

### 27. A uniform rod 9 m long weighing 40 kg is pivoted at a point 2 m from one end where a weight of 120 kg is suspended. The required force acting at the end in a direction perpendicular to rod to keep it equilibrium, at an inclination 60° with horizontal, is

### 28. The C.G. of a right circular cone lies on its axis of symmetry at a height of

### 29. The c.g. of a thin hollow cone of height h, above its base lies on the axis, at a height of

### 30. U1 and u2 are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are v1 and v2. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by

### 31. Maximum efficiency of a screw jack for the angle of friction φ, is

### 32. The resultant of two forces P and Q acting at an angle θ, is

### 33. The mechanical advantage of an ideal machine is 100. For moving the local through 2 m, the effort moves through

### 34. When a body in equilibrium undergoes an infinitely small displacement, work imagined to be done, is known as

### 35. If three rigid rods are hinged together to form a triangle and are given rotary as well as translatory motion, the number of instantaneous centres of the triangle, will be

### 36. If a body moves in such a way that its velocity increases by equal amount in equal intervals of time, it is said to be moving with

### 37. The unit of Moment of Inertia of a body, is

### 38. A projectile is thrown at an angle a to the horizontal with α velocity v. It will have the maximum centripetal acceleration

### 39. The locus of the instantaneous centre of a moving rigid body, is

### 40. The equation of motion of a particle starting from rest along a straight line is x = t3 - 3t2 + 5. The ratio of the accelerations after 5 sec and 3 sec will be

### 41. At a given instant ship A is travelling at 6 km/h due east and ship B is travelling at 8 km/h due north. The velocity of B relative to A is

### 42. The forces which meet at one point and have their lines of action in different planes are called

### 43. The centre of gravity of a triangle is at the point where three

### 44. 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

### 45. The following is not a law of static friction:

### 46. M.I. of solid sphere, is

### 47. The motion of a particle is described by the relation x = t²- 10t + 30, where x is in meters and t in seconds. The total distance travelled by the particle from t = 0 to t = 10 seconds would be

### 48. 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

### 49. When a circular wheel rolls on a straight track, then the shape of body centrode and space centrode respectively are

### 50. A cable loaded with 10 kN/m of span is stretched between supports in the same horizontal line 100 m apart. If the central dip is 10 m, then the maximum and minimum pull in the cable respectively are

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