Carl lewis set a world record for the 100.0-m run with a time of 9.86 s. if, after reaching the finish line, mr. lewis walked directly back to his starting point in 90.9 s, what is the magnitude of his average velocity for the 200.0 m?

The magnitude of his average velocity for the 200.0 m is zero.

Explanation:

Given that,

Distance = 100.0 m

Time = 9.86 s

Now, back to his starting point

Time = 90.9 s

Average velocity :

Average velocity is equal to the total displacement divided by the total time.

In mathematical form,

Where, D = Displacement

t = time

He started at the Start line, and ended at the Start Line.. his Net displacement will be Zero so the average velocity will be

Using formula of average velocity,

Hence, The magnitude of his average velocity for the 200.0 m is zero.

divide the right side by the left side

0.024÷1.2=0.02 for example

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.