A ball is dropped from a height of 45m above the ground. Calculate the velocity of the ball just before it strikes the ground. (Neglect air resistance and take g as \(10ms^{-2}\)

• A.21.2\(ms^{-1}\)
• B.30\(ms^{-1}\)
• C.300\(ms^{-1}\)
• D.450\(ms^{-1}\)
• E.900\(ms^{-1}\)