Explanation:
It is given that,
Mass of the football player, m = 92 kg
Velocity of player, v = 5 m/s
Time taken, t = 10 s
(1) We need to find the original kinetic energy of the player. It is given by :
k = 1150 J
In two significant figure, 
(2) We know that work done is equal to the change in kinetic energy. Work done per unit time is called power of the player. We need to find the average power required to stop him. So, his final velocity v = 0
i.e. 
P = 115 watts
In two significant figures, 
Hence, this is the required solution.
(a) R2, R3 are parallel and series with R1
(b) R1, R2 and R3 are in parallel
Explanation:
(a)
Ra and R1 is in series
And there total will be R
(b)
Experiment
After the scientist make a hypothesis, they perform an experiment to collect data.
Answer:
this is from quizlet and is similar hope it helps.
Explanation:
Which of the following statements about the force on a charged particle due to a magnetic field are not valid?
Check all that apply.
a. It depends on the strength of the external magnetic field.
b. It depends on the particle's charge.
c. It depends on the particle's velocity.
d. It acts at right angles to the direction of the particle's motion.
e. None of the above; all of these statements are valid.
https://mrsstowell.weebly.com/uploads/5/1/4/6/51460659/hsav_riverdale.k12.wi.us_20160330_092123.pdf
