Question

An object is moving toward east with speed 5 m/s. After t = 5 s it is found to be moving towards north with speed 5 m/s, then average acceleration will be ?

Answer 1

$$\begin{gathered} Velocity,v=5i+5j \\ Magnitude,v=\sqrt{5^2}+5^2=\sqrt{50} \\ Avg.acceleration=\frac{\sqrt{50}}{5}=1.41m/se{c}^2 \end{gathered}$$