Question

car travelling from A to B at the speed of 40 km per hour and returns with a speed of 60 km per hour calculate the average speed and velocity​

Answer 1

A ------> 40 km/h ------> B

B ------> 60 km/h ------> A

Let total distance b/w A and B be " x "

Average Speed :

$\bigstar\ \; \sf Average\ Speed=\dfrac{Total\ Distance}{Total\ TIme}$

$:\implies \sf A_{Speed}=\dfrac{x+x}{t_{A\to B}+t_{B\to A}}$

• Time = Distance / Speed

$:\implies \sf A_{Speed}=\dfrac{2x}{\frac{x}{40}+\frac{x}{60}}$

$:\implies \sf A_{Speed}=\dfrac{2x}{\frac{3x+2x}{120}}$

$:\implies \sf A_{Speed}=\dfrac{240x}{5x}$

$:\implies \sf \pink{A_{Speed}=48\ km/h}\ \; \bigstar$

Average Velocity :

$\bigstar\ \; \sf Average\ velocity=\dfrac{Displacement}{Total\ Time}$

Here , body comes to initial position

( A -> B & B -> A ) .

So , Displacement is zero .

$:\implies \sf A_{Velocity}=\dfrac{0}{Total\ Time}$

$:\implies \sf \green{A_{Velocity}=0\ m/s}\ \; \bigstar$

Answer 2

$\huge\bold{<strong><u>answEr</u></strong>}$

velocity=0m/s

hope it help uh

☺️thankuh☺️