The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to____________________? September 7, 2025 by Admin A. log r B. r C. r2 D. 1/r ✅ The correct answer is option C.
A cube on a smooth horizontal surface___________________? September 7, 2025 by Admin A. cannot be in stable equilibrium B. cannot be in neutral equilibrium C. cannot be in unstable equilibrium D. can be in any of these states ✅ The correct answer is option D.
Which of the following represents the state of neutral equilibrium ? September 7, 2025 by Admin A. a cube resting on one edge B. a smooth cylinder lying on a curved surface C. a smooth cylinder lying on a convex surface D. none of the above ✅ The correct answer is option D.
A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is___________________? September 7, 2025 by Admin A. 1/3 B. 2/3 C. 1/9 D. 8/9 ✅ The correct answer is option D.
The number of funicular polygons which can be drawn to pass through two specified points in the space diagram are__________________? September 7, 2025 by Admin A. zero B. 1 C. 2 D. infinity ✅ The correct answer is option D.
A simple pendulum of length 1 has an energy E when its amplitude is A. If its amplitude is increased to 2 A, the energy becomes____________________? September 7, 2025 by Admin A. E B. E/2 C. 2E D. 4E ✅ The correct answer is option D.
A body is dropped from a height of 100 m and at the same time another body is projected vertically upward with a velocity of 10 m/sec. The two particles will____________________? September 7, 2025 by Admin A. never meet B. meet after 1 sec C. meet after 5 sec D. meet after 10 sec ✅ The correct answer is option D.
When a circular wheel rolls on a straight track, then the shape of body centrode and space centrode respectively are________________? September 7, 2025 by Admin A. straight line and parabola B. straight line and circle C. circle and straight line D. circle and parabola ✅ The correct answer is option C.
It is observed that in a certain sinusoidal oscillation, the amplitude is linearly dependent on the frequency f. If the maximum velocity during the oscillation is V, then V must be proportional to_________________? September 7, 2025 by Admin A. f B. 1/f C. 1/f2 D. f2 ✅ The correct answer is option D.
Force polygon method is applicable for_____________________? September 7, 2025 by Admin A. any copianar force system B. a system of parallel forces only C. concurrent copianar force system D. non-concurrent copianar force system ✅ The correct answer is option C.