The formula for calculating the height an object was dropped from is h = (1/2)gt^2, where h is the height, g is the acceleration due to gravity (9.8 m/s^2), and t is the time the object took to fall.
No, the mass of an object does not affect the height it was dropped from. The height an object is dropped from is determined by the force of gravity and the time it takes to fall, which are not affected by the mass of the object.
Air resistance can slightly affect the height an object is dropped from, as it can slow down the object's fall. However, this effect is usually negligible for most everyday objects and can be ignored for the sake of calculations.
No, the height an object is dropped from cannot be greater than its starting height. This would violate the law of conservation of energy, as the object would have gained energy during its fall, which is not possible without an external force acting on it.
The main difference between dropping an object and throwing it from a height is the initial velocity. When an object is dropped, it has an initial velocity of 0, while throwing an object gives it an initial velocity in a specific direction. This initial velocity affects the object's motion and the height it will reach after being thrown.