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Friction

Quiz by Cyrus Flores,

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20 questions
Show answers
  • Q1
    Which of the following factors affect the magnitude of friction?
    velocity and temperature
    density and volume
    normal force and surface roughness
    mass and acceleration
    30s
  • Q2
    Static friction occurs when:
    an object is moving in a straight line
    an object is sliding down a ramp
    two surfaces are at rest relative to each other
    two surfaces are moving past each other
    30s
  • Q3
    Friction is the force that:
    opposes motion
    increases motion
    causes motion
    has no effect on motion
    30s
  • Q4
    Which of the following factors can reduce friction?
    applying lubricant
    roughening the surfaces
    increasing weight
    increasing the normal force
    30s
  • Q5
    What is the definition of the normal force?
    The force that causes an object to accelerate.
    The force exerted by an object in motion.
    The force of gravity exerted on an object.
    The force exerted by a surface to support the weight of an object resting on it.
    30s
  • Q6
    In which direction does the normal force act on an object?
    Perpendicular (or normal) to the surface
    Opposite to the direction of motion
    Parallel to the surface
    In the same direction as the force applied
    30s
  • Q7
    What is static friction?
    The force that opposes the start of motion between two surfaces in contact
    The force that pulls objects towards the center of the Earth
    The force exerted by a moving fluid on an object
    The force that occurs when an object is in motion
    30s
  • Q8
    How does static friction compare to kinetic friction?
    Static friction is generally less than kinetic friction
    Static friction is generally greater than kinetic friction
    Static friction only occurs on rough surfaces
    Static friction and kinetic friction are equal in strength
    30s
  • Q9
    Which statement best describes static friction?
    It decreases with the applied force
    It is only present when an object is in motion
    It increases with the roughness of the surface
    It always remains constant for a given pair of surfaces
    30s
  • Q10
    What is the maximum value of static friction?
    It is always equal to the weight of the object
    It is always zero
    It varies depending on the coefficient of static friction and the normal force
    It is the same for all surfaces
    It is always equal to the applied force
    30s
  • Q11
    Which of the following is true about the coefficient of kinetic friction?
    It depends solely on the mass of an object.
    It is typically higher than the coefficient of static friction.
    It is typically lower than the coefficient of static friction.
    It remains constant for a given pair of surfaces.
    30s
  • Q12
    What is kinetic friction?
    The force that causes an object to move in a circular path.
    The force experienced by an object at rest.
    The force that increases an object's velocity.
    The force that opposes the relative motion between two surfaces in contact.
    30s
  • Q13
    What is the approximate value of acceleration due to gravity on Earth?
    1 m/s^2
    4.9 m/s^2
    16 m/s^2
    9.8 m/s^2
    30s
  • Q14
    If an object is dropped from a tall building, how does its velocity change due to acceleration due to gravity?
    It remains constant
    It decreases
    It increases
    It fluctuates
    30s
  • Q15
    Which of the following is a measure of the friction between two surfaces?
    Acceleration
    Force
    Velocity
    Coefficient of friction
    30s

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