Engineering Mechanics problems
- 1. Joule is the unit of
Options- A. force
- B. work
- C. power
- D. velocity Discuss
Correct Answer: work
- 2. When a body of mass m attains a velocity v from rest in time t, then the kinetic energy of translation is
Options- A. mv2
- B. mgv2
- C. 0.5 mv2
- D. 0.5 mgv2 Discuss
Correct Answer: 0.5 mv2
- 3. A number of forces acting at a point will be in equilibrium, if
Options- A. all the forces are equally inclined
- B. sum of all the forces is zero
- C. sumof resolved parts in the vertical direction is zero (i.e. ?V = 0)
- D. none of these Discuss
Correct Answer: sumof resolved parts in the vertical direction is zero (i.e. ?V = 0)
- 4. The forces which meet at one point, but their lines of action __________ on the same plane, are Known as non-coplaner concurrent forces.
Options- A. lie
- B. do not lie Discuss
Correct Answer: do not lie
- 5. The forces, whose lines of action are parallel to each other and act in the same directions, are known as
Options- A. coplaner concurrent forces
- B. coplaner non-concurrent forces
- C. like parallel forces
- D. unlike parallel forces Discuss
Correct Answer: like parallel forces
- 6. The moment of inertia of a solid cone of mass m and base radius r about its vertical axis is
Options- A. 3mr2/5
- B. 3mr2/10
- C. 2mr2/5
- D. 4mr2/5 Discuss
Correct Answer: 3mr2/10
- 7. The force induced in the string AB due to the load W, as shown in the below figure is
Options- A. W sin ?
- B. W cos ?
- C. W sec ?
- D. W cosec ? Discuss
Correct Answer: W cosec ?
- 8. According to Newton's first law of motion,
Options- A. every body continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
- B. the rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts
- C. to every action, there is always an equal and opposite reaction
- D. none of the above Discuss
Correct Answer: every body continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
- 9. The kinetic energy of a body __________ upon its mass and velocity.
Options- A. does not depend
- B. depends Discuss
Correct Answer: depends
- 10. A force while acting on a body may
Options- A. change its motion
- B. balance the forces, already acting on it
- C. give rise to the internal stresses in it
- D. all of these Discuss
Correct Answer: all of these
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