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# 1. Neglecting air resistance, how fast will a soccer ball (m = 0.45 kg) be travelling when it hits the ground, if it's dropped from the Sears Tower

1. Neglecting air resistance, how fast will a soccer ball (m = 0.45 kg) be travelling when it hits the ground, if it's dropped from the Sears Tower (442 m high)? How long will it take to hit the ground?