Question

A body covers the first 1/4th of the
displacement with a velocity 50 m/s
and the remaining with a velocity 30
m/s. Then the average velocity of the
body is (in m/s)​

Answer 1

Answer:

Average Velocity = 33.33m/s

Explanation:

Let,

Total Distance = S

Case-I

Distance = S/4

Velocity = 50m/s

Time = $\frac{S/4}{50}$

Case-II

Distance = 3S/4

Velocity = 30m/s

Time = $\frac{3S/4}{30}$

Average Velocity = $\frac{Total Distance}{Total Time}$

=$\frac{S}{\frac{S/4}{50}+\frac{3S/4}{30}}$ = 33.33m/s