A stone is dropped from the upper observation deck (the Space Deck) of the CN Tower, 450 m above the ground. If the stone is thrown downward with a speed of 5 m/s, how long does it take to reach the ground?
A stone is dropped from the upper observation deck (the Space Deck) of the CN Tower, 450 m above the ground. If the stone is thrown downward with a speed of 5 m/s, how long does it take to reach the ground?