Engineering Mechanics problems
- 1. The mechanical advantage of a lifting machine is the ratio of
Options- A. distance moved by effort to the distance moved by load
- B. load lifted to the effort applied
- C. output to the input
- D. all of the above Discuss
Correct Answer: load lifted to the effort applied
- 2. A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.
Options- A. True
- B. False Discuss
Correct Answer: True
- 3. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as
Options- A. principle of independence of forces
- B. principle of resolution of forces
- C. principle of transmissibility of forces
- D. none of these Discuss
Correct Answer: principle of resolution of forces
- 4. Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the ball with velocity v is made to struck the second ball. Both the balls after impact will move with a velocity
Options- A. v
- B. v/2
- C. v/4
- D. v/8 Discuss
Correct Answer: v/2
- 5. The angle between two forces when the resultant is maximum and minimum respectively are
Options- A. 0° and 180°
- B. 180° and 0°
- C. 90° and 180°
- D. 90° and 0° Discuss
Correct Answer: 0° and 180°
- 6. When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
Options- A. simple pendulum
- B. compound pendulum
- C. torsional pendulum
- D. second's pendulum Discuss
Correct Answer: compound pendulum
- 7. The velocity ratio in case of an inclined plane inclined at angle ? to the horizontal and weight being pulled up the inclined plane by vertical effort is
Options- A. sin ?
- B. cos ?
- C. tan ?
- D. cosec ? Discuss
Correct Answer: sin ?
- 8. If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
Options- A. 30°
- B. 60°
- C. 90°
- D. 120° Discuss
Correct Answer: 120°
- 9. The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in magnitude and direction by the third side of a triangle, taken in opposite order.
Options- A. True
- B. False Discuss
Correct Answer: True
- 10. The frequency of oscillation of a torsional pendulum is
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
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