Classical mechanics MCQ’s
1. Choose what happens inelastic collisions,
- both of the momentum and total kinetic energy are conserved only the total kinetic energy is conserved.
- only the total momentum of the colliding objects is conserved.
- neither momentum of the colliding bodies nor the total kinetic energy is recoverable.
- None of the above
- What is the length of the Tensile strain is …
- Force per unit area
- Extension per unit length
- Force per unit volume
- Force per unit length
- For streamline motion of an incompressible non-viscous fluid , is states by Bernoulli’s principle …
- the pressure at any part + the kinetic energy per unit volume = constant
- the kinetic energy per unit volume + the potential energy per unit volume = constant
- the pressure at any part + the potential energy per unit volume = constant
- the pressure at any part + the kinetic energy per unit volume + the potential energy per unit volume = constant
- While bulk modulus ‘K’ relates to change in volume and Young’s modulus ‘E’ relates to change in length and, modulus of rigidity ‘G’ relates to change in:
- shape
- weight
- density
- temperature
- Young’s modulus is defined as which of the following…
- tensile stress/tensile strain
- tensile strain/tensile stress
- tensile stress × tensile strain
- length/area
- Hooke’s law states that…
- load is dependent on extension
- the extension is inversely proportional to the load when the elastic limit is not exceeded
- the extension is independent of the load when the elastic limit is not exceeded
- the extension is proportional to the load when the elastic limit is not exceeded
- If simple harmonic variations of a pendulum die away after some time ,Due to energy dissipation by viscous forces in air, then oscillation is said to be…
- undamped
- damped
- free
- dependent
- The yield point of a copper wire…
- the load hasn’t exceeded the elastic limit yet; so, Hooke’s law applies
- the load has already exceeded the elastic limit and the material has become plastic
- even the plastic stage has passed and the wire has snapped already
- none of above.
- Stationary waves are said to be which type of wave…
- static waves
- progressive waves
- standing waves
- All of the above
- Forces in field is said to be when we moving a particle round a closed loop in a field is zero,
- Zero forces
- Non-Conservative forces
- Conservative forces
- Viscous forces
- maximum frictional force has to be overcome, In order to slip one surface over another, this maximum frictional force between two surfaces is also known as
- kinetic frictional force
- maximal frictional force
- limiting frictional force
- none of above
- What is the uniform density of core, acceleration due to gravity below Earth’s surface is
- inversely proportional to the square of the distance from the center of the Earth
- inversely proportional to the distance from the center of the Earth
- directly proportional to the square of the distance from the center of the Earth
- directly proportional to the distance from the center of the Earth
- At points in a moving fluid where potential energy change is very small,by Bernoulli’s principle is due to…
- the pressure is low where the velocity is low and similarly, the pressure is high where the velocity is high
- pressure remain independent of the speed of the stationary fluid
- pressure becomes independent of the velocity of the moving fluid
- the pressure is low where the velocity is high and conversely, the pressure is high where the velocity is low
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