Answer the following in brief:
A driver notices that the speedometer reading changes continuously between \(30\ km/h\) and \(60\ km/h\) while travelling on a straight road. What does this indicate about the car's motion? Explain why these readings alone are insufficient to calculate the average speed of the journey.
The changing speedometer reading shows the car's , which is the speed of the car at a . Since the reading changes from\(30\ km/h\) to \(60\ km/h\), it indicates that the car is .
A speedometer does not provide information about the or the for the journey. Therefore, the speedometer reading alone cannot be used to calculate the , as average speed depends on the total distance covered during the entire journey divided by the total time taken.