Question

If the boat goes from 30 km/h to 50 km/h over the next 4 h, what is its acceleration?

Please help me

Answer 1

The acceleration is 5km/h

Step-by-step explanation:

Given

Initial Velocity (u) = 30km/h

Final Velocity (v) = 50km/h

Time (t) = 4h

Required

Determine the acceleration

This question will be answered using the first equation of motion;

`v = u + at`

Substitute values for u, v and t

`50 = 30 + a * 4`

`50 = 30 + 4a`

Subtract 30 from both sides

`50 - 30 = 30 - 30+ 4a`

`20 = 4a`

Divide both sides by 4

`(20)/(4) = (4a)/(4)`

`5 = a`

`a = 5`

Hence;

The acceleration is 5km/h