Physics Review

66 Questions | Total Attempts: 39

SettingsSettingsSettings
Please wait...
Physics Quizzes & Trivia

Review for physics 1210


Questions and Answers
  • 1. 
    A distance of 1*10^-9 km is equivalent to a distance of
    • A. 

      1 nm

    • B. 

      1 um

    • C. 

      1 mm

    • D. 

      .1 mm

    • E. 

      None

  • 2. 
    What are the 3 basic units in the scientific system of units (SI system) we have used in class?
    • A. 

      Miles, kilograms, seconds

    • B. 

      Meters, kelvins, seconds

    • C. 

      Miles, pounds, seconds

    • D. 

      Meters, kilograms, seconds

    • E. 

      Meters, kilograms, mi/hour

  • 3. 
    The speed of light is about 3.00x10^8 m/s. Whats the speed of light in miles/hour? (1 mile = 1609 meters)
    • A. 

      6.71 x 18^8 miles/hr

    • B. 

      1.34 x 10^8 miles/hr

    • C. 

      3.00 x 10^8 miles/hr

    • D. 

      186,000 miles/hr

    • E. 

      None

  • 4. 
    All except one of the following require the application of a net force. Which ones the expection?
    • A. 

      To change an object from a state of rest to a state of motion

    • B. 

      To maintain an object in motion at a constant velocity

    • C. 

      To change an objects speed w/out changing its direction of motion

    • D. 

      To maintain an object in uniform circular motion

    • E. 

      To accelerate an object

  • 5. 
    Consider a 50 kg person held up by a rope in the diagram shown. The tension in the rope is __________________________\\\\\\\\\\\\\\\\\   0   /////////////////////
    • A. 

      Equal to the persons weight

    • B. 

      Half the persons weight

    • C. 

      Between 250 and 500 N

    • D. 

      Greater than 500 N

    • E. 

      50 Kg

  • 6. 
    A rocket flies at constant velocity straight up. whats the direction of the net force on the rocket?
    • A. 

      Up

    • B. 

      Down

    • C. 

      Can not be determined w/out knowing rocket mass

    • D. 

      Cant be determined w/out knowing the wind resistance

    • E. 

      None of the previous

  • 7. 
    A hot rod starting at rest and uniformly accelerating covers a distance of 400 meters in 15 seconds. What is the acceleration to two significant figures?
    • A. 

      3.6 m/s^2

    • B. 

      4.4 m/s^2

    • C. 

      2.2 m/s^2

    • D. 

      27 m/s^2

    • E. 

      None

  • 8. 
    A ball is thrown up at 15 m/s, whats the velocity after 3.0 seconds?
    • A. 

      14 m/s up

    • B. 

      14 m/s down

    • C. 

      44 m/s up

    • D. 

      44 m/s down

    • E. 

      None

  • 9. 
    A 20.0 kg block on a smooth horizontal surface is acted upon by two horizontal forces: a force of 20 N acting to the left and a force of 60 N to the right? The acceleration fo the block will be
    • A. 

      3.0 m/s^2 to the right

    • B. 

      4.0 m/s^2 to the right

    • C. 

      40 m/s^2 to the right

    • D. 

      2.0 m/s^2 to the left

    • E. 

      None

  • 10. 
    Which of the following units would be approriate to describe force?
    • A. 

      Kg*m/s^2

    • B. 

      M/s^2

    • C. 

      Kg/s

    • D. 

      Kg*m/s

    • E. 

      None

  • 11. 
    What is the magnitude of the accleration produced by a net force of 4500 N acting on a 900 kg automobile?
    • A. 

      .20 m/s^2

    • B. 

      3.8 m/s^2

    • C. 

      5.0 m/s^2

    • D. 

      9.8 m/s^2

    • E. 

      None

  • 12. 
    A 150 lb student races up stairs with a vertical height of 3.0 m in 4.0 seconds to get to class on the second floor. how much power in watts does the student expend in doing work against gravity? (Hint: The equivalent weight of 1 kg mass = 2.2 lbs, so the students mass in kilograms 68 kg)
    • A. 

      51 W

    • B. 

      167 W

    • C. 

      5.0 * 10^2 W

    • D. 

      890 W

    • E. 

      None

  • 13. 
    A 0.15 kg ball traveling with a speed of 50 m/s is brought to rest in a catcher's mitt with an average force of 75 N. What is the maginutde of the impulse exerted by the mitt on the ball?
    • A. 

      75 Ns

    • B. 

      11.3 Ns

    • C. 

      3750 Ns

    • D. 

      7.5 Ns

    • E. 

      None

  • 14. 
    A 5.0-kg cat travels to the left at 10 m/s and a 10-kg dog travels to the right at 5.0 m/s. The total momentum is
    • A. 

      125 kg m/s to the left

    • B. 

      0

    • C. 

      50 kg m/s to the right

    • D. 

      100 kg m/s to the right

    • E. 

      None

  • 15. 
    Money (US paper bill) was used in class to illustrate
    • A. 

      How to convert between different units or denominations

    • B. 

      Decimal, or powers of 10, notation

    • C. 

      Using algebraic equations to describe word (finance) problems

    • D. 

      Free fall

    • E. 

      None

  • 16. 
    A child plays on a see-saw with her father. The child has a weight of 250 N and is seated 2.5 m from the axis of rotation. Her father balances her when he is seated 0.80 m from the axis. The fathers weight is
    • A. 

      250 N

    • B. 

      500 N

    • C. 

      667 N

    • D. 

      725 N

    • E. 

      750 N

  • 17. 
    A book weighing 10 N is held at rest in the palm of the hand. The reaction to the force of the hand on the book is a force of
    • A. 

      10 N exerted by the Earth on the book

    • B. 

      10 N exerted by the book on the Earth

    • C. 

      10 N exerted by the book on the hand

    • D. 

      0 N

    • E. 

      9/8 m/s^2 in the downward direction arising from the force of the eart

  • 18. 
    A ball is projected upward with an initial velocity of 5 m/s. It will reach its maximum height in approximately
    • A. 

      0.5 s

    • B. 

      1.0 s

    • C. 

      49 s

    • D. 

      2.0 s

    • E. 

      0.0 s

  • 19. 
    The tablecloth pull demo (where objects remain on the table when the tablecloth is pulled out from under theM) was used in class to demonstrate
    • A. 

      Conservation of momentum

    • B. 

      Action and reaction

    • C. 

      Conservation of energy

    • D. 

      Newton's 2nd Law

    • E. 

      Newton's 1st Law

  • 20. 
    A force of 40 N is applied at the end of a wrench that is 0.2 meters from the axis of the bolt. The direction of the force points along the legnth of the wrench. The magnitude of the torque created is
    • A. 

      40 Nm

    • B. 

      0.2 Nm

    • C. 

      0.0 Nm

    • D. 

      8 Nm

    • E. 

      Angel of force on wrench must be given

  • 21. 
    A student, sitting on a stool rotating at a rate of 12 RPM, holds masses in each hand. When her arms are pulled in, the total rotational inertia of the system is 2.0 kg m^2. She then extends her arms form her body, increasing the total rotational inertia to 5.0 kg m^2. If there are no external torques, what is the new rotational velocity of the system?
    • A. 

      30 RPM

    • B. 

      60 RPM

    • C. 

      4.8 RPM

    • D. 

      12 RPM

    • E. 

      None

  • 22. 
    If an astronaut landed on a planet that was three times the diameter and three times the mass of earth, how would his weight there compare with that on earth?
    • A. 

      Same

    • B. 

      Three times as much

    • C. 

      One ninth as much

    • D. 

      One third as much

    • E. 

      None

  • 23. 
    The nucleus of an atom is made of
    • A. 

      Protons

    • B. 

      Neutrons

    • C. 

      Electrons

    • D. 

      Protons & electrons

    • E. 

      Protons & neutrons

  • 24. 
    Consider a small 3-d model of uniform denisty but arbitrary shape with a mass of 2.0 kg. Now scale all dimensions of the mdoel up by a factor of 5. What would be the new model's mass?
    • A. 

      2.0 kg

    • B. 

      10 kg

    • C. 

      50 kg

    • D. 

      500 kg

    • E. 

      250 kg

  • 25. 
    A hydraulic jack is used to lift a load of weight 2.0 x 10^3 N. The load-bearing cylinder has a radius of 4.0 cm, and the other piston has a radius of 1.0 cm. What force must be exerted on the smaller piston to support the load (2 sig figs)?
    • A. 

      1.6 x 10^4 N

    • B. 

      6.2 x 10 N

    • C. 

      1.3 x 10^2 N

    • D. 

      1.0 x 10^3 N

    • E. 

      None