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Newton's laws of motion

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  • what are the two forces that stop an object in motion?
    friction and gravity
  • What is newton's first law?
    An object in motion stays in motion, an object at rest stays at rest unless acted upon by an unbalanced force.
  • Your car is spinning tires in your icy driveway. What type of friction are you lacking?
    rolling friction
  • What is force measured in?
    Newtons
  • An apple fell fro a tree at the rate of 2 m/s2 and hit my head with the force of 3N. What is the mass of the apple?
    1.5kg
  • What is mass measured in?
    Kg
  • If you are not wearing a seatbelt and your car crash you can be ejected from the car. This is an example of
    Newton's first law
  • How do we describe force?
    a push or a pull
  • When you kick a soccer ball and it moves the forces are _________ (balanced or unbalanced)
    unbalanced
  • What is inertia?
    An objects resistance to a change in motion
  • What is the acceleration of softball if it has a mass of 0.5 kg and hits the catcher's glove with a force of 25 N?
    50 m/s2
  • How does the law of inertia effect the passengers in a car that is suddenly slowing down? (what will happen to the passengers)
    They are abruptly pushed forward as their body wants to continue at the same speed as the train was traveling.
  • What units is acceleration measured in?
    m/s2
  • What is the mass of a falling rock if it produces a force of 147 N?Acceleration of gravity is 9.8m/s2
    15kg
  • A10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2?
    30 N
  • You rolled a marble down the ramp. It hit a cup causing the cup to move backwards. Which law of motion is this an example of?
    Newton's 3rd Law
  • The force that causes objects to move in a circle is
    centripetal force
  • What is Newton's 2nd law?
    Force = Mass x Acceleration
  • Why did the golf ball push the cup farther than the other balls in the conservation of momentum lab?
    because it had more momentum
  • When two teams are playing tug of war and neither team wins. What can you say about the forces?
    they are balanced
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