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thschica
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A stone is dropped from the top of a cliff. It is seen to hit the ground below after 3.30 s. How high is the cliff?
The speed of the stone when it hits the ground can be calculated using the equation v = square root of (2gh), where v is the speed, g is the acceleration due to gravity (9.8 m/s^2), and h is the height of the cliff.
The time it takes for the stone to reach the ground can be calculated using the equation t = square root of (2h/g), where t is the time and h is the height of the cliff.
According to the law of gravity, the mass of an object does not affect its rate of fall. Therefore, the mass of the stone will not affect its fall from the top of the cliff.
According to the law of conservation of energy, the total energy of a system remains constant. Therefore, the stone will hit the ground with the same speed it was dropped, as there are no external forces acting on it to change its speed.
The speed of the stone's fall can be affected by air resistance, which can slow down the stone's descent. The height of the cliff and the acceleration due to gravity can also affect the speed of the stone's fall.