SCI206 Lecture Notes - Defrosting, Stainless Steel, Hydrophile
11 Mar 2013
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For every force that one object exerts on a second object, there is an equal but oppositely directed force that the second object exerts on the first object. What determines the effect we will experience due to gravity? o. It is a downward force produced by the earth which acts on us, pulling us down: the gravitational effect we experience is always an acceleration of ~10 m/s2 -- regardless of our mass. Its horizontal velocity will never change, because there are no forces present to change it (recall newton"s first law) Its vertical velocity will be subject to gravity, so its upward progress will slow, eventually become zero, then start to head downwards. For example, lifting a ball from the ground to a table. Imagine a scenario where (with friction present) you are pushing a block horizontally across the floor.
