Recent content by mantxi

The balloon's mass is given by the formula P=m*g, the speed at which it's moving doesn't change its mass. So, 10800=m*10 then m=1080kg Using that value in your calculation gives us: F= -m(a-g) => F= -1080*(1-10) = 9720N

Before dropping the object the total energy is E = K + U = 0+mgh. After falling, the total energy will be E' = K' + U' = 2U' + U' = 3U' As we know, E = E' Then, mgh = 3mgh' --> h' = 1/3 h