When the angular velocity of a uniformly rotating body has increased thrice, the resultant of force applied to it increases by 60 newton. Find the acceleration of the body in two cases. The mass of the body, m = 3 kg

• A

  $2\cdot 5\mathrm{m}/{\mathrm{s}}^2,7\cdot 5\mathrm{m}/{\mathrm{s}}^2$

• B

  $7\cdot 5\mathrm{m}/{\mathrm{s}}^2,22\cdot 5\mathrm{m}/{\mathrm{s}}^2$

• C

  $5\mathrm{m}/{\mathrm{s}}^2,45\mathrm{m}/{\mathrm{s}}^2$

• D

  $2\cdot 5\mathrm{m}/{\mathrm{s}}^2,22\cdot 5\mathrm{m}/{\mathrm{s}}^2$