Question

2.
A particle travels half of the distance of a straight
journey with a speed 6 m/s. The remaining part of
the distance is covered with speed 2 m/s for half of
the time of remaining journey and with speed 4 m/s
for the other half of time. The average speed of the
particle is
(1) 3 m/s
(2) 4 m/s 69
(3) 3/4 m/s
(4) 5 m/s
in
& mis
4 m/s Amis
112​

Answer 1

Explanation:

v1=6. v2= 3.

avg speed =2v1v2/v1+v2

=2*6*3/6+3

=36/9

=4m/s