To reach your school at 10:30 AM, if you
start at 10 AM, first move 800 m to east,
then 600 m to north and finally 200m to
west, your average velocity and average
speed are (in metre /sec)
Answers
Given : To reach your school at 10:30 AM
you start at 10 AM,
first move 800 m to east,
then 600 m to north
and finally 200m to west,
To Find : average velocity and average speed
Solution:
800 m to east,
600 m to north
200m to west, = (-200) m East
Distance = 800 + 600 + 200 = 1600 m
Displacement ( North 600 m East 600 m)
= √600² + 600²
= 600√2 m
10 AM to 10:30AM
Time = 30 minutes = 1800 Sec
average velocity = Displacement / Time
= 600√2/ 1800
= √2/ 3
= 0.4714 m/s
average speed = 1600/ 1800
= 8/9
= 0.8889 m/s
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