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Initially the air resistance (r) is low, and the force due to gravity (mg) is high. These forces are unbalanced so the skydiver accelerates downwards. (mg > r)As the velocity increases the force of air...
Standing waves are produced from the superposition of 2 progressive waves with the same wavelength, travelling in opposite directions. The pattern consists of nodes and antinodes. Nodes are formed from d...
Sometimes it is more useful for us to represent a vector in terms of other vectors added together. For example, we can split a vector into the vectors pointing in the direction of our axes, we call these ...
45 femtometers to two significant figures
A falling object will reach terminal velocity when the force draging it down (ie its weight due to gravity) is equal to the air resistance opposing the motion upwards. When the two forces are equal the ob...
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