Question

Answer the following problems:
1/4 body has a speed V, 2 and 3V in the first second and the remaining of the total
distance respectively, its average speed is
b) 2V
c)
d)
2) A car travels a distance S, on a straight road in 2 hours and then return to the starting
point in the next three hours. Its average velocity is,
d) zero
3) A man has to go 50m due north, 40m due east and 20m due south to reach a field. Then
a) The distance that he has to walk to reach the field is 110m
b) The distance that he has to walk to reach the field is 100m
c) The displacement from his house to the field is 50m NE
d) The displacement from his house to the field is 50m NW.​

Answer 1

3. c is correct. and a is also correct.