annalian said:As l (length of road) is twice as big l2=2l1, but the time is equal t1=t2, then velocity should be two times bigger. Am I right?
Could you give me a hint about the correct one?CWatters said:Your answer is correct but I'm not sure I understand your reasoning.
You need to explain how you are defining t1 and t2. These are the times taken to do what? (I believe your reasoning is fine if you fill that in appropriately.)annalian said:Could you give me a hint about the correct one?
t1 is the time taken to meet the mirror, t2 i the time taken to meet the reflection. As the mirror and reflection are met in the same time t1=t2haruspex said:You need to explain how you are defining t1 and t2. These are the times taken to do what? (I believe your reasoning is fine if you fill that in appropriately.)
With that preamble, your answer looks good to me.annalian said:t1 is the time taken to meet the mirror, t2 i the time taken to meet the reflection. As the mirror and reflection are met in the same time t1=t2
Speed is a measure of how fast an object is moving. It is usually represented as distance traveled per unit of time, such as meters per second or miles per hour.
Speed is directly proportional to distance and inversely proportional to time. This means that the greater the distance an object travels in a given amount of time, the higher its speed will be. Similarly, the longer the time it takes for an object to travel a certain distance, the lower its speed will be.
Speed is calculated by dividing the distance traveled by the time it takes for the object to travel that distance. This can be expressed as the equation: speed = distance / time.
Average speed is the total distance traveled divided by the total time taken, while instantaneous speed is the speed of an object at a specific moment in time. Average speed gives an overall picture of how fast an object is moving, while instantaneous speed shows the exact speed at a particular instant.
The higher the speed of an object, the greater the distance it will travel in a given amount of time. This is because speed is directly proportional to distance, meaning that as speed increases, so does the distance traveled.