Rita is going to meet her friend Gita who stays near to Rita's home. Following graph shows her motion over the journey. What is the distance traveled by the Rita during 0 to 6 min?
Answers
Answer
a)14min
b)600m
c)from 14 to16 minutes
d)for 6 minutes
e)4.16m/s
Explanation:
a)the displacement is given starting from this girl's house,so after 14 minutes she have reached her friend's house,in the remaining two minutes she had returned to her house,so those two minutes won't count as time took by her to reach her friend's house.
b)in the chart they've given the displacement,not the distance, distance and displacement are different from each other because displacement is a vector which has a direction and a magnitude,while distance is not a vector, it only has a magnitude, doesn't have a direction.so you have to count the distance DE also to find out the answer.
c)between 14 and 16 minutes the displacement has dropped from 500m to 0,which means she had returned to the starting point where the motion started,and that's her house..
d)in the following parts of the motion,her displacement hadn't changed,which means she was at rest at that time,those parts are,
AB,CD,EF
the relevant time period belonging to those parts are,2mins for each,so she was at rest for 6 minutes.
e)velocity=displacement/time
=500m/120s
(in this part,2 mins=2×60 seconds)
=4.16m/s