Suppose you walk across a room of length with a velocity of one and a half kilometer per hour. Express this velocity in m/s and find the time you will take to move across the room.
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Answer:
Displacement = 9m
velocity = 1.5km/hr
1km/hr = 1000m/60×60sec
= (1000/3600)m/s
= 5/18m/s.
to convert km/hr to m/s ,just multiply the given value
of km/hr by 5/18.
v = 1.5× 5/18 = 0.4116.
v = d/t
t = d/v = 9/0.4116 = 21.603sec
hope its helps you.
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