**Answer:**

1) Acceleration of player is 7.8125 .

2) Constant speed of player is 12.5 m/s.

**Explanation:**

Let the acceleration of the player by 'a' and let he complete the initial 10 meters in time

The initial 10 meters are case of uniformly accelerated motion and hence we can relate the above quantities using second equation of kinematics as

now since the player starts from rest hence u = 0 thus the equation can be written as

The speed the player reaches after time is obtained using first equation of kinematics as

Since the total distance traveled by the player is 40 meters hence the total time of trip is 4 seconds hence we infer that he covers 30 meters of distance at a constant speed in time of seconds

Hence we can write

Solving equation i and ii we get

from equation 'i' we obtain

Using this in equation 'ii' we get

Thus constant speed equals

**Answer: Standard **

**Explanation:**

Standard based reliability is the methodology prediction for reliability for the system and components based on the failure estimated rate published by globally recognized commercial and military standard. Standard based reliability prediction are basically useful for development in the initial stage when the data failure are not available.

The law requires employers to provide their employees with working conditions that are free of known dangers. The OSH Act created the Occupational Safety and Health Administration (OSHA), which sets and enforces protective workplace safety and health standards.

**Answer:**

Randomized Control Trial (RCT)

**Explanation:**

A Randomized Control Trial (RCT) study is a type of scientific study method, especially used in medical studies, where the subjects of the study are randomly assigned to two groups (Test and control groups). The test groups receive a medical intervention whose effect is to be studied, while the control group receives a placebo (a substance that is inert and has no therapeutic value). Notably in this study design is that apart from the medical intervention of interest, every other variable such as age, sex, race, etc. is controlled (the same across all the groups), to reduce the occurrence of biases, and this is to ensure that the difference in the outcomes between the test and control groups are as a result of the variable of interest alone. Randomization is also critical because it helps reduce recruitment bias and mimics natural occurrence as much as possible.