A speedboat increases its speed uniformly from 20 m/s to 30 m/s in a distance of 200m. Find
(a) the magnitude of its acceleration and
(b) the time it takes the boat to travel the 200-m distance.
(a) This is the motion with constant acceleration. We can use the following equation to find the magnitude of acceleration
where , , . Then
(b) We can find the time of the travel from the following equation: