Question

A car is travelling along a straight line. It covers
one-half of the total distance with a velocity
10 ms. The remaining part of the distance was
covered with a velocity 12 ms-'. for half the time
and with velocity 16 ms-' for the other half the
time. Find the average speed over the whole time
of motion​

Answer 1

Answer:

Let total distance d

Let time covered for first one third distance bet

1

Then t

1

=

4

d/3

=

12

d

t

2

be time for next two journeys

d−

3

d

=

3

2d

=2t

2

+6t

2

=8t

2

t

2

=

12

d

Averagevelocity=

Totaltime

Totaldistane

=

t

1

+2t

2

d

=

12

d

+

12

2d

d

=4m/s