Givens.
• The mass of the ballon is 2.30 kg.
,
• The height is 35.65 m.
First, find the final velocity when the balloon is at the bottom. Use a formula that relates height, initial speed, final speed, and gravity.
Where
• v_0 = 0 because the balloon starts from rest.
,
• Gravity is g = 9.8 m/s^2.
,
• h = 35.65 m.
Use all these magnitudes to find the final velocity v_f
Once we have the velocity at the bottom, find the kinetic energy using its formula.
Where m = 2.30 kg, and v = 26.4m.s.
Therefore, the kinetic energy at the bottom is 801.5 J.