An object falls freely from a height of 25m onto the roof a building 5m high. Calculate the velocity with which the object strikes the roof (g=10\(ms^{-2}\)

• A.17.3\(ms^{-2}\)
• B.20\(ms^{-2}\)
• C.24.5\(ms^{-2}\)
• D.125\(ms^{-2}\)
• E.200\(ms^{-2}\)