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Physics Review (Forces, Movement, Elasticity) (2 ...

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  • A car travels 120 miles in 12 hours. What is the car's speed?
    10 mph
  • A car driving down the road runs out of gas (petrol), its acceleration decreasing but still moving. Which of Newton's laws explains why the car continues to move without gasoline (petrol)?
    1st Law of Motion (Law of Inertia)
  • TRUE OR FALSE. A negative acceleration would imply that the object in question is in constant speed.
    False.
  • Rob Gronkowski spiked a 1.4kg football at the ground at an acceleration of 1.7m/s/s. What is the force at which the ball was spiked?
    2.38 N
  • What law of motion does the picture illustrate?
    Third law.
  • A spring extends elastically by 0.1 m when a force of 2 N is applied. What is the value of its spring constant?
    20
  • (Mass Weight Density Acceleration) Among the choices, which of the following is the object's mass coupled with the gravitational force?
    Weight.
  • If a 40 kg student is pushed in a rolling chair with a force of 30 N, what is the student's acceleration?
    0.75
  • A squirrel has a weight of 4.9 N. What is his mass if he is running on the ground?
    0.5 kg
  • What are the units for acceleration?
    meter per second squared (m/s^2)
  • A ____________ is a push or a pull on an object.
    Force
  • An unstretched spring has a length of 0.10 meters. When the spring is stretched by a force of 16 newtons, its length is increased to 0.18 meters. What is the spring constant of this spring?
    2.0 N/cm
  • (DIRECTLY PROPORTIONAL, INVERSELY PROPORTIONAL) Which of the following is the relationship between the force applied to a spring and its extension?
    Directly proportional.
  • How will this object move?
    It will move to the right.
  • Balanced or Unbalanced?
    Unbalanced.
  • A spring extends elastically by 10 cm when a force of 20 N is applied to it. What force would be needed to extend the spring by 5 cm?
    10 N
  • (Breakdown, Elastic limit, End of tether, Fracture stress) Hooke's Law fails when a material reaches its:
    Elastic limit.
  • Has this material stretched beyond the limit of proportionality?
    No.
  • According to Newton's second law, what happens if you increase the force applied to an object?
    It accelerates more.
  • TRUE OR FALSE: An object is under uniform acceleration when its direction is straight.
    False.
  • Harry Styles has a Weight of 732 N on Mars where the acceleration due to gravity is 3.7m/s/s. What is his mass on Mars?
    197.8 kg
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