Sky diving involves free fall under gravity along with the drag due to air molecules pushing against the body slowing the rate of fall of a body. This is actually a significant amount of force. The drag force depends on the contact surface area and weight of the body. More the surface area in contact, more would be the drag. The sitting position of the skydiver would experience less drag than the chest down position. This is because of the less contact surface area of the body with the air molecules while in the former case. Since no two persons have identical body shape and weight, the rate of fall can be made nearly equal but not exactly equal. This is would be possible when they are having same body position.
If the runner ends where she started, then her total displacement is 
, which means her average velocity will be
The total distance she traversed, however, was 
, which gives her an average speed of
Explanation:
Work done = F * d = 100N * 0.5m = 50J.
We make use of a one-sample t-test for a population mean.
One-sample t-test for a population mean
Option B
<h3> Sample mean and Sample standard deviation</h3>
A Sample Standard Deviation is the root-mean square of the data minus the sample mean,
The sample mean is is the mean of the randomly selected sample
Therefore, For a data or sample where we have no information on population standard deviation and here only one sample group is compared, we make use of a one-sample t-test for a population mean
A one-sample t-test for a population mean
More on Probability
brainly.com/question/795909
