This means a release of free energy from the system corresponds to a negative change in free energy, but to a positive change for the surroundings.
The second brother Brother because he is much heavier and therefore has more energy to be released hope this helps
To Find :
The horizontal range of a projectile launched at 15 degrees to the horizontal with speed of 40 m/s.
Solution :
The horizontal range of a projectile is given by :
( Here, g is acceleration due to gravity = 10 m/s² )
Putting all value in above equation :

Therefore, the horizontal range of projectile is 80 m.