#Dynamics projectile motion equations how to

This just means that provided no external force acts upon a particle it won’t change it’s motion in any way.

A particle will remain at rest or continue with its motion, unless acted upon by an external force. Every action has an equal and opposite reaction.Īll of this is fine, but what do these laws really mean?ġ.The force on an object is equal to its mass multiplied by its acceleration ( ).A particle will remain at rest or continue with its motion, unless acted upon by an external force.The things Newton is most famous for (aside from the incident with the apple) are his laws of motion: We have him to thank for gravity (I should probably add he discovered, not invented it, otherwise people will start blaming him every time they fall over). If we said that the velocity to begin with was the same as the speed: 10, then when the body is travelling in exactly the opposite direction, with the same speed, the velocity would be – 10. The speed before it turned around is the same as after. If a body is travelling horizontally in a straight line with a speed of 10 then stops and goes in the exact opposite direction, with a speed of 10 there has obviously been a change, however the speed does not reflect this. Probably the best way to consider velocity is if you think or an ordinary x,y-axis. Speed is just how fast something is going, it doesn’t matter if it’s going up, down, left or right, all that matters is how far it travels in a set time. It might seem sometimes that speed and velocity are the same thing (often they’re equal to each other), but they are actually slightly different. Displacement, Force, Velocity, Acceleration and Momentum are all vector quantities.Energy, Length, Mass, Speed, Temperature and Time are all scalar quantities.

When dealing with measurements you can use scalar or vector quantities.

#Dynamics projectile motion equations how to

If you’re already familiar with the equations you might want to skip ahead to the next section, otherwise I’ll explain where they came from and how to use them. I never found out if they was right, I learnt these ones too, just in case: Someone once told me that all you needed to know for a Dynamics exam was: and everything else could be derived from that. That being said the rules have’t changed much and are fairly predictable, at least on large scales. It’s something that you would think would be one of the first things to be figured out, but wasn’t fully locked down until fairly recently. Dynamics is the name give to the rules of motion.