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Snemalna Knjiga Besedilo

  • Things become harder to accelerate when they have larger mass, mass is how much matter an object has this is why its easier to move a soccer ball than a goal.
  • Acceleration is the increase or rate of the speed of something like a soccer ball. 
  • Newton's second law states that when a force is applied to an action it causes the object to accelerate.
  • Eventually no matter how hard I kick this soccer ball it will stop because of the friction on the ground and the air.
  • Motion is the phenomenon in which an object changes its position.
  • It also states that the ball will stay in motion until an unbalanced force acts on it.
  • Newton's first law states that this ball will stay here until another force affects it.
  • An unbalance force could be me kicking the ball.
  • Newton's first law is also known as the law of inertia, inertia describes how much an object like my soccer ball will resist change to the motion of an object.
  • When I kick the ball it creates speed and velocity.
  • Newton's second law also has many other forms to measure it like speed and velocity
  • Speed is the just the rate at which something is traveling, velocity is very similar to this but it includes the direction the object is going.
  • Similar to a reference point a frame of reference is anything you see while in motion, so when I run down the field a frame of reference could be the people watching the game.
  • To do this we can find the distance the ball traveled and the time it took to stop.
  • The formula for this is speed = distance over time, to make this easier we can use a reference point such as the goal or a nearby tree.
  • But what if you wanted to calculate the speed of the soccer ball.
  • Possible directions could be North, East, South, and West.
  • Displacement is another way to measure only the distance and direction.
  • Since my head is applying force to the ball the ball applies the same amount of force back, this is why sometimes after I hit the ball my head hurts.
  • This is shown when I use my head to hit the ball.
  • Finally newton's third law states that for every action there is and equal and opposite reaction.
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