A farmer moves along the boundary of a rectangular field ABCD as shown in
the figure. He takes 4 minutes to travel across each side.
A - B = 80m
B-C = 40m
C-D=80m
D-A=40m
Is the motion of this farmer uniform or non-uniform? Find his average speed
over one complete round of the field.
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the motion of the farmer is non uniform because he is travelling 40 m in 4 min i.e. he travels with a speed of 1/6 m/s and then travelling 80 m in 4 min i.e., he moves with a speed of 1/3 m/s
He's speed is increasing and decreasing thus, it is not a uniform motion
average speed of the farmer = total distance
------------------------
total time taken
time is in min
firstly convert it into second
16x60
960s
average speed = 40+80+40+80
-----------------------
960
=0.25 m/s
......ok
...is it helpful
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