Selected MCQ

Current Question
Which frame is non-inertial?
  • A. Constant velocity frame
  • B. Rotating frame
  • C. Free-fall frame
  • D. Spacecraft coasting
Correct Answer: B
Explanation:
Rotating frames experience fictitious forces.
Related Question 1
In a non-inertial rotating frame, the Coriolis force acting on a particle is proportional to:
  • A. Velocity squared
  • B. Angular velocity cross velocity
  • C. Mass only
  • D. Displacement
Correct Answer: B
Explanation:
Coriolis force is given by (2m(\vec{\Omega} \times \vec{v})).
Related Question 2
Which quantity is invariant in all reference frames?
  • A. Velocity
  • B. Time
  • C. Rest mass
  • D. Length
Correct Answer: C
Explanation:
Rest mass is Lorentz invariant.
Related Question 3
In a relativistic framework, mass-energy equivalence is expressed as:
  • A. (E = mc)
  • B. (E = mc^2)
  • C. (E = \frac{1}{2}mv^2)
  • D. (E = hv)
Correct Answer: B
Explanation:
Einstein showed mass can be converted into energy via (E=mc^2).