forces

• what is newtons first law of motion

  • objects will remain at rest or continue moving at the same velocity unless there is a resultant forcd
• How is newtons first law applied

  • if two forces are balanced then the object remains stationary or at a constant velocity and resultant force is 0
  • velocity can only change unless there is a resultant force
• what is newtons second law

  • force = mass x acceleration
  • the acceleration of an object is directly proportional to it's force and inversely proportional to it's mass|
• how is newtons second law applied

  • an object will accelerate due to a resultant force
  • the bigger the force the bigger the acceleration
  • for a force the bigger the mass the small acceleration is received
• what is newtons third law of motion

  • if two objects interact the force the expert on each other will be equal and opposite
  • to fit this criteria the force must be the same type,equal,opposite and act on different things
• how is newtons third law applied

  • if a car collides with a wall it exerts a force on the wall which is worked from newtons second law mass x accleration
  • the wall exerts and equal force back but because it's opposite the force it exerts is negative
• why can an object going a circle have a constant speed but not a constant velocity

  • speed is a scalar,quantity velcoity is a vector quantity
  • because velocity is a vector quantity when it's effected by both mass and distance and because the distance is constantly changing so the velocity is constantly changing
• what is centripetal forcr

  
  

  • centripedal force is the resultant perpindicular force of an object in order to remain in uniform circular motion
  • always perpindicular to the direction of travel and is located in a circle

  
• what is weight

  • weight is the force acting on an object due to its mass and gravity
  • weight(n) = mass (kg) x gravitional field strength(n/kg)
  • dependant on mass (amount of matter) and gravitional field strength of planey
• How can we measure weight

  • using a calibrated spring balance
• what is a force pair

  two different opposite objects exerting a force on each other
• what is a force

  • a push or pull an object recieves due to being in contact with another object
• what is the difference between a contact force and a non contact force

  • a contact force requires the objects to be physically touching (air resistance,tension,friction)
  • non contact force doesn't require an object to be touching and creates a field around that object which weakness as it gets further (magneticv electrostatic gravitional)
• things that effect the centrpedal force

  • the speed of the car
  • the mass of the car