Question

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Answer 1

Answer:

Av. velocity = 0m/s

Av. speed = 22.5m/s

Explanation:

The concept is written...

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DIKSHA ❤

111a

Answer 2

QUESTION:

Sohan travels at 20 m/s from home to market and returns back home at 25 m/s. Find the average velocity and average speed for the entire journey

ANSWER:

Average velocity = 0

Average speed = 22.22 m/s

GIVEN:

$v_1\:(or)\:s_1$ = 20 m/s

$v_2\:(or)\:s_2$ = 25 m/s

TO FIND:

Average velocity and Average speed

FORMULAE:

VELOCITY = DIPLACEMENT ÷ TIME

SPEED = DISTANCE ÷ TIME

TIME = SPEED / DISTANCE

EXPLANATION:

As he reaches back home displacement is zero. Hence average velocity is zero as VELOCITY = DIPLACEMENT ÷ TIME

$Avg\:velocity \: = \frac{d - d}{ \frac{d}{s_1} + \frac{d}{s_2} } \\ \\ Avg \: speed \: = \frac{0}{d( \frac{1}{20} + \frac{1}{25} ) }$

HENCE AVG VELOCITY = ZERO

SPEED = DISTANCE ÷ TIME

Take distance as d

$Avg \: speed \: = \frac{d + d}{ \frac{d}{s_1} + \frac{d}{s_2} } \\ \\ Avg \: speed \: = \frac{2d}{d( \frac{1}{20} + \frac{1}{25} ) } \\ \\Take \:L.C.M \:on \:the\: denominator\:\\ \\Avg \: speed \: = \frac{2}{( \frac{5 + 4}{100} ) } \\ \\ Avg \: speed \: = \frac{200}{9} = 22.22 \: m/s$

HENCE THE AVG SPEED = 22.22 m/s