Question

What’s the velocity of the balloon? Use . A hot-air balloon with a mass of 400 kilograms moves across the sky with 3,200 joules of kinetic energy. The velocity of the balloon is __ meters/second.

Answer 1

4m/s is the answer

Answer 2

KE =
`(1)/(2) m {v}^(2) \\`


`3200 = (1)/(2) * 400 * {v}^(2) \\ 3200 = 200 * {v}^(2) \\ (3200)/(200) = {v}^(2) \\ 16 = {v}^(2) \\ v = √(16) = 4 \: m {s}^( - 1)`

Velocity of balloon will be 4 m/s.

!! Hope It Helps !!