Question

Bicycle increase velocity from 10 kilometre per hour to 15 kilometre per hour at 6 seconds calculate its acceleration

Answer 1

Given;

u = 10kmph

v = 15 kmph

t= 6 second

v = u + at

=> 15 = 10 + 6a

=> 6a = 5

=> a = 5/6 km/ hour^2

Answer 2

▶ Solution :

✴ Given :

▪ Intial velocity = 10kmph

▪ Final velocity = 15kmph

▪ Time interal = 6s

✴ To Find :

▪ Acceleration of the bicycle.

✴ Concept :

▪ Acceleration is defined as thr ratio of change in velocity to the time interval.

▪ Acceleration is a vector quantity.

▪ It has both magnitude as well as direction.

✴ Conversion :

✏ 1kmph = 5/18mps

✏ 10kmph = 10×5/18 = 2.78mps

✏ 15kmph = 15×5/18 = 4.17mps

✴ Calculation :

$\implies\bf\:a=\dfrac{v-u}{t}\\ \\ \implies\sf\:a=\dfrac{4.17-2.78}{6}\\ \\ \implies\boxed{\bf{\orange{a=0.23\:ms^{-2}}}}$