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Speed is the rate of change of distance(basically how much distance(m) has been covered in a particular time(s)). Velocity is the rate of change of displacement( change of distance in a particular directi...

To be able to answer this question, you must recall the facts about speed/time graphs:- A straight, horizontal line means there is no change in speed- A straight, vertical line means that...

This is a common question in A-level physics and a core concept for the course.  

Fission occurs when a heavy nucleus splits into smaller, more stable nuclei, releasing energy in the proc...

First we make a sketch of the situation. Then we notice that V can be found by using Pythagoras. Finally, we find theta using the definition of a tan.

The first step in answering any question is to figure out what the question really means! Velocity is a term physicists use to describe not just speed, but speed in a particular direction. When we talk...