A particle starts with an initial velocity of \( 10.0 \, \text{ms}^{-1} \) along \( x \)-direction and accelerates uniformly at the rate of \( 2.0 \, \text{ms}^{-2} \). The time taken by the particle to reach the velocity of \( 60.0 \, \text{ms}^{-1} \) is _________.
