newtons law test

• Newtons first Law: Inertia

  anything at rest will remain at rest, until a force is applied
• what is Inertia 


  the tendency to remain the same speed  
• what is Newtons first law?

  Inertia. anything at rest will remain at rest, until a force is applied
• Speed:

  a measure of how fast something is moving or the distance covered per unit of time
• Equation of speed 


  speed = distance divided by time (written as a fraction) km per h
• Acceleration

  • The changing speed in a certain time
  • A mission of the objects change in motion

  symbol: a

  units: metres per second squared (m/s2)
• Force: 


  A push, pull or a twist that causes an object to accelerate, change direction or change shape.

  symbol: F

  unit: Newton (N)
• Mass: 


  the amount of matter present in an object or a measure of the inertia (resistance to change in motion) of an object

  symbol: m

  units: kilogram (kg)
• weight: 


  a measure of the gravitational force that acts on the material or the force due to gravity on an object

  units: Newtons (N)
• equation form:


  weight = mass x acceleration due to gravity

  weight = mg
• Newton's second law: 


  force = mass x acceleration
• newton's third law: 


  for every action force, there's an equal and opposite reaction force.

  example: foot pushed on ground, ground pushed foot back.
• Force and Acceleration


  Force affects acceleration; more force means greater acceleration
• define the term Inertia


  the tendency to remain the same speed   
• Which force causes things to slow down on earth?


  Friction
• Which of Newton’s Laws would be best represented by a girl flying over her handle bars as she accidentally pushes on the front brake of her bicycle?

  Newton's First Law: The girls inertia keeps her moving, although the bike braking
• Which of Newton’s laws is best represented by throwing a ball at a wall and seeing how far it bounces back?

  Newton's third law
• Which of Newton’s laws is best represented by a boy trying to see how far he can kick a soccer ball, a tennis ball, and a bowling ball?

  Newton's 2nd law, since for a give force the various objets with differing mass will accelerate differently
• what is Newton's first law?

  law of inertia
• what is Newton's second law?

  Law of force and acceleration
• what is newtons third law?

  law of action and reaction
• Newton’s third law states that for every action, there is an equal and opposite reaction. If a car smashes into a wall with 4,000 N of force, and the wall doesn’t move, then how much force does the wall exert back on the car?

  4,000 N
• Unbalanced forces always cause an object to stop, start, speed up, slow down, or change direction. What is one word that can be used to describe all of these changes in motion?

  acceleration
• Newton’s first law is the law of inertia. Which would have more inertia: A bowling ball, feather, or a mouse?

  the bowling ball