Forces and motion

• Weight is the force exerted on a mass by gravitational field
• Mass is how much matter is in an object
• Force is a vector
• Resultant force is the overall force on an object.
• Force is represented as arrows. Aswell, the length of the arrows shows how strong the force Is. The directions of the arrow shows the direction the force is heading
• Stopping distance = thinking distance + braking distance
• Ice / rain / worn tyres increases the stopping distace as the force between the round and the tyre is less. This is because there is less frictions to crease a resistance to slow down / stop
• Newtons 1st law is of zero resultant force acts on an abject the object will remain stationary or object moves at a constant speed in a straight line
• Newtons 2nd law is if there is a resultant force acting in an object

  • The object accelerates in the direction of the resultant force
  • The acceleration is directly proportional to the resultant force
  • The acceleration is inversely proportional to the objects mass.
• Newtons 3rd law is when two objects interact , the force they exert on each other are equal in magnitude and opposite in direction
• 9.8 m/s^2 is gravity