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Phinal Physics Test

Quiz by Julie Memler

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33 questions
Show answers
  • Q1
    If a force is exerted on an object, which statement is true?
    A small force always produces a large change in the object’s momentum.
    A small force applied over a long time interval can produce a large change in the object’s momentum.
    A large force always produces a large change in the object’s momentum.
    A large force produces a large change in the object’s momentum only if the force is applied over a very short time interval.
    30s
  • Q2
    The impulse experienced by a body is equivalent to the body’s change in
    force.
    momentum.
    acceleration
    velocity
    30s
  • Q3
    A freight train rolls along a track with considerable momentum. If it rolls at the same speed but has twice as much mass, its momentum
    zero.
    unchanged.
    twice.
    four times as much.
    30s
  • Q4
    The speed of a 4-kg ball with a momentum of 12 kg m/s is
    3 m/s.
    none of the above
    4 m/s.
    48 m/s.
    12 m/s.
    30s
  • Q5
    A car traveling along the highway brakes to a stop over a certain distance. More braking force is required if the car has
    all of the above
    less stopping distance.
    more momentum.
    more mass.
    none of the above
    30s
  • Q6
    Padded dashboards in cars are safer in an accident than non-padded ones because passengers hitting the dashboard encounter
    shorter time of contact.
    decreased impulse.
    lengthened time of contact.
    increased momentum.
    30s
  • Q7
    Compared with falling on a stone floor, a wine glass may not break when it falls on a carpeted floor because the
    carpet provides a smaller impulse and a longer time.
    carpeted floor provides a smaller impulse.
    stopping time is shorter on the carpet.
    stopping time is longer on the carpet.
    30s
  • Q8
    If you can't avoid being hit by a fast-moving object, you'll suffer a smaller contact force if you can extend that force over a
    shorter time.
    longer time.
    both the same
    30s
  • Q9
    Which produces more force: driving into a very massive concrete wall with no "give," or having a head-on collision with an identical car moving toward you at the same speed?
    both the same
    wall
    need more information
    car
    30s
  • Q10
    The average braking force of a 1000-kg car moving at 10 m/s braking to a stop in 5 s is
    5000 N.
    4000 N.
    1000 N.
    2000 N.
    3000 N.
    30s
  • Q11
    Which of the following has the greatest momentum?
    a roadrunner with a mass of 1.8 kg moving at a velocity of 30 m/s
    a hare with a mass of 2.7 kg moving at a velocity of 7.5 m/s
    a turtle with a mass of 91 kg moving at a velocity of 2.4 m/s
    a tortoise with a mass of 275 kg moving at a velocity of 0.70 m/s
    30s
  • Q12
    The recoil momentum of a cannon that kicks is ________ the momentum of the cannonball it fires.
    the same as
    more than
    less than
    30s
  • Q13
    A roller coaster climbs up a hill at 4 m/s and then zips down the hill at 30 m/s. The momentum of the roller coaster
    is greater up the hill than down the hill.
    remains the same throughout the ride.
    is greater down the hill than up the hill.
    is zero throughout the ride.
    30s
  • Q14
    Two skaters stand facing each other. One skater’s mass is 60 kg, and the other’s mass is 72 kg. If the skaters push away from each other without spinning,
    their momenta are equal but opposite.
    their total momentum decreases.
    their total momentum doubles.
    the lighter skater has less momentum.
    30s
  • Q15
    The change in an object’s momentum is equal to
    the net external force divided by the time interval.
    the product of the force applied to the object and the time interval.
    the time interval divided by the net external force.
    the product of the mass of the object and the time interval.
    30s

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