3. If one
runs
2km in
5mins and then takes 20mins
to walk
back to starting point,
a What is his average
average velocity for total
for total trip?
A Calculate his average speed for the total trip
and Calculate his
average velocity
Velocity when he
walks straight.
Answers
Answer:
average velocity - 0 m/s
average speed - 2.6 m/s
Explanation:
Displacement is the length between the initial and final point of the path which is travelled.
Average velocity = total displacement/total time interval taken for it.
In this case the initial point and the final point is the same which is A( Since it goes from A to B then returns to B)
Hence the net displacement is 0.
Now if you put it in the formula the average velocity comes out to be 0.
Average speed = total distance covered / total time taken
total distance walked by the person
= 2km +2km
= 4km
= 4000 m ( convert it into meter)
Total time taken
= 5 + 20min
= 25 min
= 1500 s ( convert it into second)
therefore,
average speed = 4000 / 1500
= 2.6 m/s