Jumping With An Umbrella From Roof - Will It Save Us?

If you have two balls which look the same, but have different masses,
which will be the first to reach the ground?


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People often believe that the heavier ball will fall more quickly. They think that gravity acts more on a heavier object thus pulling it down faster. In fact, gravity works independently of mass. This means that all objects should fall at the same rate. Galileo is said to have tested this idea by dropping balls of different mass from the Leaning Tower of Pisa.

In practice, the speed that objects fall may vary, because air resistance will act on objects pushing them up slightly, in opposition to gravity. The greater the surface areas of an object the more surface for air to push up against and so air resistance will act upon a falling object, slowing its fall. The amount of air resistance acting upon something is dependent upon its shape and size. A large parachute slows the fall of a person, bringing them slowly to the ground. If there is no air resistance or the same amount of air resistance, then objects of the same mass will fall at the same rate.

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