Question

A particle moving in a straight line covers half the distance with Speed 3 metres per second and the other half of the distance is covered in two equal time intervals with speed of 4.5 metre per second and 7.5 metre per second respectively. then the average speed of particle during this motion is

Answer 1

av speed in other half distance = (4.5+7.5)/2

=12/2=6m/s

av speed of whole distance = (6+3)/2

=9/2=4.5m/s

The answer is 4.5 metres per second.