People playing a basketball game in a gymnasium make up a closed system with 17,125 J of energy. At the beginning of the game the system has 16,250
J of ME, and at the end it has 1,135 J of ME. How much of the total energy
was transformed into thermal energy during the game?

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

3. dark matter

empty space could also be a simple vacuum

the ima (higher than 1m) will be greater than the ima with the height of 1m.