Physics
Which SUVAT equation to use? The 3 equations of motion
To pick a SUVAT equation, list s, u, v, a and t and fill in the three you know. The letter you don't know and don't need picks it:...
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Physics
How to read distance-time and velocity-time graphs
To read a motion graph, read the vertical axis first. On a distance-time graph, the gradient is the speed and a flat line means stopped. O...
Physics
Distance vs displacement: how can displacement be zero?
Displacement is zero whenever you finish exactly where you started. Distance is the length of the path you actually travel, so it only has...
Physics
10 Newton's second law examples in everyday life (F = ma)
Newton's second law says the resultant force on an object equals its mass times its acceleration: F = ma. You can see it every time y...
Physics
How Do Rockets Work in Space With No Air? Newton's Third Law
A rocket doesn't push on air or on the ground. It pushes on its own exhaust gas. The engines throw hot gas out of the bottom, and by ...