Chapter Test : Newton's Law Of Motion

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Chapter Test : Newton
Newton's laws of motion are three physical laws that form the basis for classical mechanics. They describe the relationship between the forces acting on a body and its motion due to those forces.

  
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  • 1. 
    Which of the following statements are true of Inertia? List all that apply.
    • A. 

      Inertia is a force.

    • B. 

      Inertia is a force which keeps stationary objects at rest and moving objects in motion at constant velocity.

    • C. 

      Inertia is a force which brings all objects to a rest position.

    • D. 

      All objects have inertia and more massive object has more inertia than a less massive object.

    • E. 

      None of the above.


  • 2. 
    Which of the following statements are true of the quantity mass List all that apply.
    • A. 

      Mass depends on how much stuff is present in an object and the mass of an object is mathematically related to the weight of the object.

    • B. 

      The standard metric unit of mass is the kilogram and the mass of an object can be measured in pounds.

    • C. 

      The mass of an object is dependent upon the value of the acceleration of gravity.

    • D. 

      None of the above.


  • 3. 
    Which of the following statements are true of the quantity weight? List all that apply.
    • A. 

      The weight of an object is dependent upon the value of the acceleration of gravity.

    • B. 

      A person could reduce their weight significantly by taking an airplane ride to the top of Mount Everest.

    • C. 

      When a chemistry student places a beaker on a balance and determines it to be 84.3 grams, they have weighed the beaker.

    • D. 

      None of the above.


  • 4. 
    Which of the following statements are true of an object that experiences balanced forces (or unbalanced forces)? List all that apply.
    • A. 

      If a person is moving to the right, then the forces acting upon it are NOT balanced.

    • B. 

      A balance of forces is demonstrated by an object which is slowing to a stop.

    • C. 

      It would take an unbalanced force to keep an object in motion.

    • D. 

      None of the above.


  • 5. 
    Consider Newton's first law of motion to determine which of the following statements are true? List all that apply.
    • A. 

      Newton's first law of motion is applicable to both moving and non-moving objects.

    • B. 

      If a football is moving upwards and rightwards towards the peak of its trajectory, then there are both rightwards and upwards forces acting upon it.

    • C. 

      If a football is moving upwards and rightwards towards the peak of its trajectory, then there are both rightwards and upwards forces acting upon it.

    • D. 

      None of the above


  • 6. 
    Which of the following statements are true of the concept of force? List all that apply.
    • A. 

      A force is a push or pull exerted upon an object which results from the interaction of that object with its environment.

    • B. 

      Bubba approaches Billie and gives him a swift shove. Timid little Billie keeps his hands in his pocket during this interaction. Subsequently, while Bubba places a force upon Billie, Billie does not place a force upon Bubba.

    • C. 

      A quarterback throws a football downfield. Once thrown, the force from the quarterback persists upon the ball to cause it to continue on its upward trajectory towards its peak.

    • D. 

      None of the above


  • 7. 
    Consider Newton's second law of motion to determine which of the following statements are true? List all that apply.
    • A. 

      The acceleration of an object is directly dependent upon its mass and inversely dependent upon its net force.

    • B. 

      If an object is moving to the right and slowing down, then the net force on the object is directed towards the left.

    • C. 

      An object has an acceleration of 8 m/s/s. If the net force acting upon the object is increased by a factor of 2, then the new acceleration would be 10 m/s/s.

    • D. 

      None of the above


  • 8. 
    The anount of net force required to keep a 5-kg object moving rightward with a constant velocity of 2 m/s is ____.
    • A. 

      0 N

    • B. 

      0.4 N

    • C. 

      2 N

    • D. 

      2.5 N

    • E. 

      None of the above


  • 9. 
    According to Newton's third law, every force is accompanied by an equal and opposite reaction force. The reason that these forces do not cancel each other is ____.
    • A. 

      The action force acts for a longer time period

    • B. 

      The two forces are not always in the same direction

    • C. 

      The two forces act upon different objects; only forces on the same object can balance each other.

    • D. 

      None of the above


  • 10. 
    As you sit in your chair and study your physics (presuming that you do), the force of gravity acts downward upon your body. The reaction force to the force of the Earth pulling you downward is ___.
    • A. 

      The force of your body pulling the Earth upwards

    • B. 

      The force of the chair pushing you upward

    • C. 

      The force of the Earth pushing you upward

    • D. 

      None of the above


  • 11. 
    A golf pro places a ball at rest on the tee, lines up his shot, draws back his club, and lets one rip. During the contact of the golf club with the golf ball, the force of the club on the ball is ____ the force of the ball on the club and the acceleration of the club is ____ than the acceleration of the ball.
    • A. 

      Less than, equal to

    • B. 

      Equal to, greater than

    • C. 

      Equal to, less than

    • D. 

      None of the above


  • 12. 
    A helicopter must have two sets of blades in order to fly with stability.
    • A. 

      First Law (inertia)

    • B. 

      Second Law (F = m•a)

    • C. 

      Third Law (action-reaction)

    • D. 

      None of the above


  • 13. 
    If you were in an elevator and the cable broke, jumping up just before the elevator hit the ground would not save you. Sorry.
    • A. 

      First Law (inertia)

    • B. 

      Second Law (F = m•a)

    • C. 

      Third Law (action-reaction)

    • D. 

      None of the above


  • 14. 
    You usually jerk a paper towel from a roll in order to tear it instead of pulling it smoothly.
    • A. 

      First Law (inertia)

    • B. 

      Second Law (F = m•a)

    • C. 

      Third Law (action-reaction)

    • D. 

      None of the above


  • 15. 
    A student desk changes the amount of force it puts on other objects throughout a school day.
    • A. 

      First Law (inertia)

    • B. 

      Second Law (F = m•a)

    • C. 

      Third Law (action-reaction)

    • D. 

      None of the above


  • 16. 
    Heavy objects are not easier to move around in a horizontal fashion on the Moon than on the Earth.
    • A. 

      First Law (inertia)

    • B. 

      Second Law (F = m•a)

    • C. 

      Third Law (action-reaction)

    • D. 

      None of the above


  • 17. 
    The stronger, heavier team in a tug-of-war does not create a larger tension in the rope than the weaker, lighter team.
    • A. 

      First Law (inertia)

    • B. 

      Second Law (F = m•a)

    • C. 

      Third Law (action-reaction)

    • D. 

      None of the above


  • 18. 

    During which time interval(s), if any, are there no forces acting upon the object? List all that apply.
    • A. 

      A and B

    • B. 

      E and F

    • C. 

      C, D and E

    • D. 

      All of the above


  • 19. 

    During which time interval(s), if any, are the forces acting upon the object balanced? List all that apply.
    • A. 

      C, D, E and F

    • B. 

      B, D, F and H

    • C. 

      D, E, F and G

    • D. 

      All of the above


  • 20. 

    During which time interval(s), if any, is there a net force acting upon the object? List all that apply.
    • A. 

      B, C, D and E

    • B. 

      E, F, G, and H

    • C. 

      A, C, E and G

    • D. 

      All of the above


  • 21. 

    During which time interval(s), if any, is the net force acting upon the object directed toward the right? List all that apply.
    • A. 

      B and C

    • B. 

      E, F and G

    • C. 

      A and E

    • D. 

      All of the above


  • 22. 

    During which time interval(s), if any, is the net force acting upon the object directed toward the left? List all that apply.
    • A. 

      A and B

    • B. 

      C, B and E

    • C. 

      C and G

    • D. 

      All of the Above


  • 23. 

    During which time interval(s), if any, are there no forces acting upon the object? List all that apply.
    • A. 

      A and B

    • B. 

      B and C

    • C. 

      C and D

    • D. 

      None of the above.


  • 24. 

     During which time interval(s), if any, are the forces acting upon the object balanced? List all that apply.
    • A. 

      A, B, C, D and E

    • B. 

      A,C, E, G and I

    • C. 

      A, B, E and G

    • D. 

      None of the above.


  • 25. 

    During which time interval(s), if any, is there a net force acting upon the object? List all that apply.
    • A. 

      B, D, F and H

    • B. 

      A and B

    • C. 

      B, D, F and I

    • D. 

      None of the above.


  • 26. 

    During which time interval(s), if any, is the net force acting upon the object directed toward the right? List all that apply.
    • A. 

      A and F

    • B. 

      C and F

    • C. 

      B and F

    • D. 

      None of the above.


  • 27. 

    During which time interval(s), if any, is the net force acting upon the object directed toward the left? List all that apply.
    • A. 

      D and H

    • B. 

      D and E

    • C. 

      D and I

    • D. 

      None of the above.


  • 28. 

    At which point(s), if any, are there no forces acting upon the object? List all that apply.
    • A. 

      A, B and C

    • B. 

      E, F and G

    • C. 

      G, A and C

    • D. 

      None of the above


  • 29. 

    At which point(s), if any, are the forces acting upon the object balanced? List all that apply.
    • A. 

      C and F

    • B. 

      C and D

    • C. 

      A and B

    • D. 

      None of the above


  • 30. 

    At which point(s), if any, is there a net force acting upon the object? List all that apply.
    • A. 

      A, B, C, D, E, F and G

    • B. 

      F, E and G

    • C. 

      A, B, and C

    • D. 

      None of the above


  • 31. 

    At which point(s), if any, is the net force acting upon the object directed toward the right? List all that apply.
    • A. 

      A, B and C

    • B. 

      D, E and F

    • C. 

      A, B and F

    • D. 

      None of the above


  • 32. 

    At which point(s), if any, is the net force acting upon the object directed upward? List all that apply.
    • A. 

      A and C

    • B. 

      E and D

    • C. 

      A and D

    • D. 

      None of the above


  • 33. 
    A 0.250-kg ball is thrown upwards with an initial velocity of 12.0 m/s at an angle of 30.0 degrees. Determine the acceleration of the ball when it has reached the peak of its trajectory. Assume negligible air resistance.
    • A. 

      9.8 m/s/s, down

    • B. 

      10 m/s/s, down

    • C. 

      8 m/s/s, down

    • D. 

      None of the above


  • 34. 
    A 72-kg skydiver is falling from 10000 feet. At an instant during the fall, the skydiver encounters an air resistance force of 540 Newtons. Determine the acceleration of the skydiver at this instant.
    • A. 

      2.6 m/s/s, up

    • B. 

      2.3 m/s/s, down

    • C. 

      3.2 m/s/s, side

    • D. 

      None of the above


  • 35. 
     A 72-kg skydiver is falling from 10 000 feet. After reaching terminal velocity, the skydiver opens his parachute. Shortly thereafter, there is an an instant in time in which the skydiver encounters an air resistance force of 1180 Newtons. Determine the acceleration of the skydiver at this instant.
    • A. 

      6.6 m/s/s, up

    • B. 

      6.5 m/s/s, up

    • C. 

      6.2 m/s/s, up


  • 36. 
    A 5.20-N force is applied to a 1.05-kg object to accelerate it rightwards across a friction-free surface. Determine the acceleration of the object. (Neglect air resistance.)
    • A. 

      4.85 m/s/s, down

    • B. 

      4.95 m/s/s, right

    • C. 

      4.5 m/s/s, rupward

    • D. 

      None of the above


  • 37. 
    A 5.20-N force is applied to a 1.05-kg object to accelerate it rightwards. The object encounters 3.29-N of friction. Determine the acceleration of the object. (Neglect air resistance.)
    • A. 

      1.82 m/s/s, down

    • B. 

      1.82 m/s/s, right

    • C. 

      1.82 m/s/s, left

    • D. 

      None of the above


  • 38. 
    Determine the applied force required to accelerate a 3.25-kg object rightward with a constant acceleration of 1.20 m/s/s if the force of friction opposing the motion is 18.2 N. (Neglect air resistance.)
    • A. 

      22.1 N

    • B. 

      22.3 N

    • C. 

      22.2 N


  • 39. 
    A 921-kg sports car is moving rightward with a speed of 29.0 m/s. The driver suddenly slams on the brakes and the car skids to a stop over the course of 3.20 seconds with the wheels locked. Determine the average resistive force acting upon the car.
    • A. 

      8330 N

    • B. 

      8340 N

    • C. 

      8350 N

    • D. 

      None of the above


  • 40. 
    A 0.250-kg rightward moving air track glider decreases its speed from 0.872 m/s to 0.798 m/s over the length of a 1.71-m long air track. Determine the average resistive force acting upon the air track glider.
    • A. 

      0.00903 N

    • B. 

      0.00943 N

    • C. 

      0.00904 N

    • D. 

      None of the above


  • 41. 
    A 1250-kg small aircraft decelerates along the runway from 36.6 m/s to 6.80 m/s in 5.10 seconds. Determine the average resistive force acting upon the plane. (Assume that its engine/propeller makes no contributes to its forward motion).
    • A. 

      7.30 x 104 N

    • B. 

      7.30 x 103 N

    • C. 

      7.30 x 102 N

    • D. 

      None of the above


  • 42. 
    A tow truck exerts a 18300-N force upon a 1210-kg car to drag it out of a mud puddle onto the shoulder of a road. A 17900 N force opposes the car's motion. The plane of motion of the car is horizontal. Determine the time required to drag the car a distance of 6.90 meters from its rest position.
    • A. 

      6.48 s

    • B. 

      6.46 s

    • C. 

      6.49 s

    • D. 

      None of the above


  • 43. 
    A 4.44-kg bucket suspended by a rope is accelerated upwards from an initial rest position. If the tension in the rope is a constant value of 83.1 Newtons, then determine the speed (in m/s) of the bucket after 1.59 seconds.
    • A. 

      14.7 m/s

    • B. 

      14.2 m/s

    • C. 

      14.3 m/s

    • D. 

      None of the above


  • 44. 
    A 22.6-N horizontal force is applied to a 0.0710-kg hockey puck to accelerate it across the ice from an initial rest position. Ignore friction and determine the final speed (in m/s) of the puck after being pushed for a time of .0721 seconds.
    • A. 

      23.0 m/s

    • B. 

      23.1 m/s

    • C. 

      23.3 m/s

    • D. 

      None of the above


  • 45. 
    A train has a mass of 6.32x104 kg and is moving with a speed of 94.3 km/hr. The engineer applies the brakes which results in a net backward force of 2.43x105 Newtons on the train. The brakes are held for 3.40 seconds. How far (in meters) does the train travel during this time?
    • A. 

      66.8 m

    • B. 

      66.9 m

    • C. 

      66.5 m

    • D. 

      None of the above


  • 46. 
    A shopper in a supermarket pushes a loaded cart with a horizontal force of 16.5 Newtons. If the cart has a mass of 33.8 kg, how far (in meters) will it move in 1.31 seconds, starting from rest? (Neglect frictional effects.)
    • A. 

      0.520 m

    • B. 

      0.319 m

    • C. 

      0.419 m

    • D. 

      None of the above


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