| The limiting force of friction is the |
A) ratio of limiting friction and normal reaction
B) friction force acting when the body is just about to move
C) friction force acting when the body is in motion
D) Minimum force of friction
| In viscous damped free vibrations, damping force is proportional to |
A) Natural Frequency
B) Displacement
C) Velocity
D) Acceleration
| Atoms bond primarily to |
A) Increase their potential energy and lose stability
B) Increase their potential energy and gain stability
C) Reduce their potential energy and lose stability
D) Reduce their potential energy and gain stability
| Which of the following is always correct for two forces P & Q passing from point O and their resultant force R? (i) If R is passing from O, then P & Q are collinear forces. (ii) Magnitude of R is greater than that of P as well as that of Q. (iii) Magnitude of R is greater than either P or Q. |
A) (i) only
B) (i) and (ii)
C) (ii) and (iii)
D) None
| When there is a reduction in amplitude over every cycle of vibration, then the body is said to have |
A) free vibration
B) forced vibration
C) damped vibration
D) underdamped vibration
| If f is frequency and T is the time period, then the Angular frequency of a Simple Harmonic Motion is |
A) 2Ï€
B) 2Ï€f
C) 2Ï€T
D) 1/T
| A body is in equilibrium under the effect of three coplanar concurrent forces P, Q and R. If the magnitude of Q is equal to 2P, then the angle between Q and R |
A) must be greater than angle between P and R
B) must be equal to angle between P and R
C) must be less than angle between P and R
D) can be greater or lesser than angle between P and R depending upon the value of P
| Which of the following instruments measure amplitude of a vibrating body? (i) Vibrometers (ii) Seismometer (iii) Amplimeter |
A) (i) and (ii)
B) (ii) and (iii)
C) (i) and (iii)
D) (i), (ii) and (iii)
| As per the latest edition of The International System of Units, kilogram is defined |
A) by an absolute mass of 1 liter of water at 4 °C
B) by the mass of an artefact IPK (International Prototype of the Kilogram), which is a golf-ball size object consisting 90% of platinum and 10% iridium
C) by the mass of ice made up from one liter of water and measured at ice point
D) by taking the fixed numerical value of the Planck constant
| The forces which meet at one point but their lines of action do not lie in one plane |
A) coplanar concurrent forces
B) coplanar non-concurrent forces
C) non-coplanar concurrent forces
D) non-coplanar non-concurrent forces
