Answer:
The car goes 100 metres in the east direction,in 4 seconds.
The car goes 50 metres in the west direction,in 1 second.
to find :
The average velocity and average speed of the car.
Step-by-step explanation:
Speed is a scalar unit which means, direction is not necessary in this case. We can simply divide the total covered distance by the total taken time,in order to calculate the average speed.
So, average speed = (100 m + 50 m)/(4sec + 1sec) = (150m/5sec) = 30m/s
Now, velocity is a vector unit,which means direction is necessary in this case. We need to find the displacement (distance between starting point and ending point of the journey) and we need to divide the displacement with total taken time.
Here,east and west are opposite directions.
So, displacement = 100 m - 50 m = 50 m in east direction
Average velocity = 50m/5sec = 10m/sec
Hence,the average speed is 30m/s and the average velocity is 10m/sec.
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