Dr Gulshan S. answered • 10/01/20
PhD In Physics and experience of teaching IB Physics and Math High sc
If a car moves at a constant rate of 5 meters per second, what distance does it reach in 45 seconds?
If a man walks a distance of 1 kilometer in 10 minutes at constant velocity, what is his velocity?
A truck is moving at a constant velocity of 80 meters per second. It needs to rush to a town that is 25 kilometers away in 5 minutes to ensure that their delivery is on time. Will they make it?
A man walks 7 km in 2 hours and 2 km in 1 hour in the same direction. What is his average speed for the whole journey?
A man walks 7 km east in 2 hours and then 2.5 km west in 1 hour. What is his average velocity for the whole journey?
You start walking from a point on a circular 400 m track and 1 hour later you are at the same point.
- What is your average speed in m/s?
- What is your average velocity in m/s?
Speed = Distance /time
5= Distance / 45
Distance = 5*45 m = 225 m
For Second Distance = 1 Km = 1000m , Time = 10 min =600 Sec
Speed = Distance /time = 1000/600= 5/3 m/s
For Third
Speed = 80m/s
Distance = 25 km = 25000m
Time = Distance /Speed = 25000/80 = 25000/80 sec = 25000/80*60 min = 250/48 min , which is more than 5 min
So it will not be able to make it
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