A ball is thrown upward with an initial velocity of 20 m/s. Using the equation 𝑣 2 = 𝑢 2 − 2 𝑔 ℎ v 2 =u 2 −2gh, calculate the maximum height it will reach (take 𝑔 = 9.8 m/s 2 g=9.8m/s 2 ).