Question

a truck takes 20s to travel the first 80m, and another 10s to travel a further 70m. what is the average speed of the truck

Answer 1

Answer:

Given Final velocity (v) = 50 m/s

               Initial velocity (u) = 30 m/s

                Acceleration (a) = 2.5 m/s2

We know v = u + at

∴ 50 = 30 + 2.5 t

⇒ 50 - 30 = 2.5 t

⇒ 2.520 = t or 8 = t

∴ Time taken to accelerate = 8 seconds

Answer 2

Answer:

5m/s

Step-by-step explanation:

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