How long does it take for a body moving with an acceleration of 0.3 m / s from a state of rest to reach a speed of 9 m / s?

For uniformly accelerated motion, the following formula is valid:
a = (v – v₀) / t,
where a is the acceleration,
v – final speed,
v₀ – initial speed,
t – time of movement with acceleration.
Determine the time t:
t = (v – v₀) / a.
The initial velocity v₀ is equal to zero, so the formula is simplified:
t = v / a = (9 m / s) / (0.3 m / s²) = 30 s.
Answer: After 30 seconds.