dynamics

mcqspedia.com has 5 Question/Answers about Topic dynamics

Dimensions of relative density are

Dimensions of relative density are
  • A. None
  • B. mass × length³
  • C. It has no dimensions, since it's a ratio of two densities
  • D. None
  • Correct Answer: Option C

When work done in moving a particle round a closed loop in a field is zero, forces in field are called

When work done in moving a particle round a closed loop in a field is zero, forces in field are called
  • A. Zero forces
  • B. Non-Conservative forces
  • C. Conservative forces
  • D. Viscous forces
  • Correct Answer: Option C

Einstein’s mass-energy relationship states that if mass decreases by Δm, energy released ΔE is given by

Einstein’s mass-energy relationship states that if mass decreases by Δm, energy released ΔE is given by
  • A. ΔE = Δm × c, where "c" denotes speed of light.
  • B. ΔE = Δm × c², where "c" denotes speed of light.
  • C. ΔE = Δm ⁄ c, where "c" denotes speed of light.
  • D. ΔE = Δm ⁄ c², where "c" denotes speed of light.
  • Correct Answer: Option B

Force that acts on a mass of 1 g and gives it an acceleration of 1 cms-2 is defined as

Force that acts on a mass of 1 g and gives it an acceleration of 1 cms-2 is defined as
  • A. 1 newton
  • B. 1 dyne
  • C. 1 pound-force
  • D. 1 pa-force
  • Correct Answer: Option B

In elastic collisions,

In elastic collisions,
  • A. only total momentum of colliding objects is conserved.
  • B. only total kinetic energy is conserved.
  • C. both of momentum and total kinetic energy are conserved.
  • D. neither momentum of colliding bodies nor total kinetic energy are recoverable.
  • Correct Answer: Option C