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

Answer:

The acceleration is 5km/h

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

$\frac{20}{4} = \frac{4a}{4}$

$5 = a$

$a = 5$

Hence;

The acceleration is 5km/h