Calculating Average Speed: Mary's 10km Run in 40 Minutes Explained

[almost__overnow]

Mary runs 10 kilometers in 40 minutes. What is her average speed in meters per second?

i don't understand and its only like the 4th day of school.

 

[lightgrav]

do you know what speed is?

do you know how a kilometer is related to a meter?
do you know how a second is related to a minute?

 

[kyle8921]

Hi there,

Don't worry, understanding scientific concepts takes time and practice. Let me explain the concept of average speed and how to calculate it.

Average speed is a measure of how fast an object is moving over a certain distance. It is calculated by dividing the distance traveled by the time it took to travel that distance.

In this case, Mary ran 10 kilometers in 40 minutes. To calculate her average speed, we need to convert both of these values into the same unit. Let's convert 40 minutes into seconds by multiplying it by 60 (since there are 60 seconds in a minute). This gives us 2400 seconds.

Now, we can divide the distance (10 kilometers) by the time (2400 seconds) to get Mary's average speed. This gives us 0.0041667 kilometers per second.

However, the question asks for Mary's average speed in meters per second. To convert from kilometers to meters, we need to multiply the value by 1000. So, Mary's average speed in meters per second is 4.1667 meters per second.

I hope this helps to clarify the concept of average speed and how to calculate it. Keep practicing and you'll get the hang of it!