Question

what type of friction is involved in the following situations: a train moving along a track, a bird in flight, walking

Answer 1

in the situation of train rolling friction acts between wheel and track, in the bird flight fluid friction acts on the bird and on walking static fiction acts on you

Answer 2

1.A train moving along  a  track -  Rolling friction

2.A bird in flight - Fluid friction      

 

3.Walking - Static friction

4.Rowing a boat in a lake - Fluid friction