Q91 / 180 · NEET 2016 (Phase 2) · Physics

In the given figure, a=15 m s-2 represents the total acceleration of a particle moving in the clockwise direction in a circle of the radius R=2.5 m at a given instant of time. The speed of the particle is

Figure

  • A
    4.5 m s-1
  • B
    5.0 m s-1
  • Correct answer
    C
    5.7 m s-1
  • D
    6.2 m s-1

Solution

Centripetal acceleration is the radial component of resultant acceleration.

Referring the figure in question, radial component of the resultant acceleration,

=15cos30°=15×32

⇒v 2r=15×32

 ⇒v=15×32×2.5≃5.7 m s-1.

Hence, the correct answer is option: 'C'.

Relevant Questions