Engineering Mechanics problems
- 1. Two blocks A and B of masses 150 kg and 50 kg respectively are connected by means of a string as shown in the below figure. The tension in all the three strings __________ be same.
Options- A. will
- B. will not Discuss
Correct Answer: will
- 2. In collision of elastic bodies, the coefficient of restitution is the ratio of the relative velocity after impact to the relative velocity before impact.
Options- A. True
- B. False Discuss
Correct Answer: True
- 3. The moment of inertia of a rectangular section 3cm wide and 4cm deep about X-X axis is
Options- A. 9cm4
- B. 12cm4
- C. 16cm4
- D. 20cm4 Discuss
Correct Answer: 16cm4
- 4. The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as
Options- A. coplaner concurrent forces
- B. coplaner non-concurrent forces
- C. like parallel forces
- D. unlike parallel forces Discuss
Correct Answer: unlike parallel forces
- 5. D' Alembert's principle basically depends upon Newton's second law of motion.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 6. A pendulum which executes one beat per second is known as
Options- A. simple pendulum
- B. compound pendulum
- C. torsional pendulum
- D. second's pendulum Discuss
Correct Answer: second's pendulum
- 7. The unit of force in S.I. system of units is
Options- A. dyne
- B. kilogram
- C. newton
- D. watt Discuss
Correct Answer: newton
- 8. The negative acceleration is called retardation.
Options- A. True
- B. False Discuss
Correct Answer: True
- 9. The length of a second's pendulum is
Options- A. 94.9cm
- B. 99.4cm
- C. 100cm
- D. 101cm Discuss
Correct Answer: 99.4cm
- 10. A screw jack used for lifting the loads is
Options- A. a reversible machine
- B. a non-reversible machine
- C. an ideal machine
- D. none of these Discuss
Correct Answer: a non-reversible machine
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