Question

A particle moves with speed v1 along a particular direction. After some time it turns back

and reaches the starting point again travelling with speed v2. Find average velocity (for

whole journey).​

Answer 1

Answer:

Let total time be 2t

t=

v

1

d

+

v

2

d

=d

(v

1

v

2

)

v

1

+v

2

t

d

=

v

1

+v

2

(v

1

v

2

)

For first half of time

Distance=ut

v

avg

=

Totaltime

Totaldistance

=

2t

ut+2d

⇒

2(v

1

+v

2

)

u(v

1

+v

2

)+2v

1

v

2

Answer 2

Answer:

the velocity of the whole journey is v2

Explanation:

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