Two runners approaching each other on a straight track have constant speeds as shown, while they are 100m apart. How long will it take for the runners to meet if they maintain their respective speeds?

one runner is running 4.5m/s while the other is 3.5m/s

Suppose a racecar is traveling around a circular track in a clockwise direction with a constant speed of 200 km/hr. What is the velocity of the racecar when it is at the northern most end of the track?

To find out how long it will take for the runners to meet, we need to determine the relative speed at which they are approaching each other.

The relative speed between the two runners is equal to the sum of their individual speeds. In this case, the relative speed is equal to 4.5 m/s + 3.5 m/s = 8 m/s.

Now, we can use the formula: time = distance / speed.

The distance that needs to be covered is 100m (as given in the question), and the relative speed is 8 m/s.

Plugging these values into the formula, we get:

time = 100m / 8 m/s = 12.5 seconds

Therefore, it will take 12.5 seconds for the runners to meet if they maintain their respective speeds.