Mechanics MCQs 01By admin / 22/02/2019 Mechanics MCQs 01: Attempt these multiples and prepare yourself. mechanics mcqs 1. The minimum number of forces required for equilibrium are 1 2 3 4 2. The range of the projectile is maximum if the angle of projection is __________ degree. 30 45 60 90 3. The center of a mass of thin rod of length l is l/4 l/3 l/2 none of these 4. center of mass of hollow right circular cone from O is 3h/4 2h/3 h/3 none of these 5. The friction is maximum if it is static limiting Dynamic none of these 6. The resultant of the system of forces acting on a rigid body is always a force a couple a force and a couple none of these 7. For a particle moving in a central force , the angular momentum is conserved zero variable none 8. The orbit of the planet is circle Eclipse Hyperbola Parabola 9. The ratio of coefficient of static friction and coefficient of kinetic friction is greater than 1 less than 1 1 none of these 10. The amplitude of the oscillation of S.H.M is doubled then its time period is doubled halved Unchanged zero 11. The path described by the particle moving with zero velocity and acceleration is a circle straight line point none 12. If three forces acting on a body in equilibrium, then they are parallel meet in a point are co-planer none 13. The general motion of a rigid body is a rotation translation vibration translation followed by a rotation 14. Tension in a string is external force non- conservative force constraint force sliding force 15. The time rate of change of angular momentum is velocity acceleration force tarque 16. When a body in contact with another body is in any position of equillibrium but not equillibrium, then the friction exerted is known as Dynamic Friction Static Friction Sliding friction Limiting Fraction 17. The general motion of a rigid body is Translation rotation Screw motion all of these 18. A particle moving in a bounded region is perform free motion bounded motion unbounded motion harmonic motion 19. The elastic string can only be extended by applying a load tension tensile force all of these 20. A string is called linear string if it obeys Newton’s law Kepler’s Law Hook’s LAW Fermit’s law 21. If plane motion rotates about a fixed axis, then the system has—— degree of freedom. 1 2 3 4 22. In general plane motion, the degree of freedom of system is 1 3 2 4 23. The axis about which the body rotates is known as central axis Instantaneous axis of rotation Symmetric axis none 24. When a body is rotating about instantaneous axis through a fixed point, its angular velocity can be expressed in terms of space variable time variable time derivatives central force 25. The plane containing the orbit of earth’s motion around the sun is called steroid ecliptic circle ring 26. The equation is inclined to ecliptic about_________ degree 25 19 91.23 23.5 27. Which of the following has greatest effect on earth sun moon stars satelites 28. The axis relative to the products of inertia are zero are known as inertia of axes principal of axes altitude of axis none 29. The axis relative to the products of inertia are zero are known as inertia of axes principal of axes altitude of axis none 30. Number of principal axes of a rigid body is 2 3 4 5 31. The principal moments of inertia are always integer rational real complex Loading …
