Related Topics
Take Another Quiz

Physics 101 Exam 1

42 Questions
Physics Quizzes & Trivia

Final exam

Questions and Answers
  • 1. 
    Science is a body of knowledge that
    • A. 

      Condenses knowledge into testable laws

    • B. 

      Describes order in nature

    • C. 

      Is an ongoing activity of humans

    • D. 

      All of the above choices are correct

    • E. 

      None of the above choices are correct

  • 2. 
    As an object freely falls downward, its
    • A. 

      Acceleration increases

    • B. 

      Velocity increases

    • C. 

      Both of these

    • D. 

      None of these

  • 3. 
    A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that
    • A. 

      The milk carton has inertia

    • B. 

      The milk carton has no acceleration

    • C. 

      There is an action-reaction pair of forces

    • D. 

      Gravity tends to hold the milk carton secure

    • E. 

      None of these

  • 4. 
    The gain in speed each second for a freely-falling object is about
    • A. 

      0

    • B. 

      20 m/s

    • C. 

      5 m/s

    • D. 

      10 m/s

    • E. 

      Depends on the initial speed

  • 5. 
    • A. 

      More than 30 m/s

    • B. 

      Zero

    • C. 

      Less than 30 m/s but larger than zero

    • D. 

      About 30 m/s

    • E. 

      More information is needed for an estimate

  • 6. 
    According to Newton's law of inertia, a rail road train in motion should continue going forever even if its engine is turned off. We never observe this because railroad trains.
    • A. 

      Are much too heavy

    • B. 

      Move too slowly

    • C. 

      Must go up and down hills

    • D. 

      Always have forces that oppose their motion

  • 7. 
    A scientific statement that can never be changed is a scientific
    • A. 

      Principle

    • B. 

      Theory

    • C. 

      Hypothesis

    • D. 

      Law

    • E. 

      None of the above choices are correct

  • 8. 
    • A. 

      Continue moving at the same velocity

    • B. 

      Move slower and slower until it finally stops

    • C. 

      Continue moving at the same speed

  • 9. 
    • A. 

      Eliminate the acceleration of free fall

    • B. 

      Increase the acceleration beyond that of free fall

    • C. 

      Slow down the acceleration of free fall

    • D. 

      Eliminate friction

  • 10. 
    The two measurements necessary for calculating average speed are
    • A. 

      Distance and acceleration

    • B. 

      Velocity and distance

    • C. 

      Acceleration and time

    • D. 

      Velocity and time

    • E. 

      Distance and time

  • 11. 
    • A. 

      15 km/h

    • B. 

      30 km/h

    • C. 

      20 km/h

    • D. 

      40 km/h

  • 12. 
    A car maintains a constant velocity of 100 km/hr for 10 seconds. During this interval it acceleration is
    • A. 

      Zero

    • B. 

      1000 km/hr

    • C. 

      110 km/hr

    • D. 

      10 km/hr

  • 13. 
    • A. 

      Equal to its weight divided by its mass

    • B. 

      Zero

    • C. 

      Equal to the product of its mass times its weight

    • D. 

      Equal to its weight

  • 14. 
    • A. 

      50 m/s

    • B. 

      100 m/s

    • C. 

      10 m/s

    • D. 

      More than 100 m/s

  • 15. 
    If an object moves with constant acceleration, its velocity must
    • A. 

      Be constant also

    • B. 

      Change by the same amount each second

    • C. 

      Always decrease

    • D. 

      Change b varying amounts depending on its speed

  • 16. 
    A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always
    • A. 

      Opposite its velocity

    • B. 

      Directed downward

    • C. 

      In the direction of motion

    • D. 

      Directed upward

  • 17. 
    If a car accelerates form rest at 2 meters per second per second, its speed 3 seconds later will be about
    • A. 

      2 m/s

    • B. 

      6 m/s

    • C. 

      4 m/s

    • D. 

      3 m/s

  • 18. 
    • A. 

      25 m/s

    • B. 

      100 m/s

    • C. 

      55 m/s

    • D. 

      60 m/s

    • E. 

      50 m/s

  • 19. 
    • A. 

      10 m

    • B. 

      2.00 m

    • C. 

      5.0 m

    • D. 

      None of the above

  • 20. 
    An object falls freely from rest on a planet where the acceleration due to gravity is 20 meters per second squared. After 5 seconds, the object will have a speed of
    • A. 

      20 m/s

    • B. 

      10 m/s

    • C. 

      50 m/s

    • D. 

      5 m/s

    • E. 

      100 m/s

  • 21. 
    If you drop an object, it will accelerate downward at a rate of 9.8 meters per second per second. If you instead throw it downwards, its acceleration (in the absence of air resistance and after it leaves your hand) will be
    • A. 

      Greater than 9.8 meters per second per second

    • B. 

      Less than 9.8 meters per second per second

    • C. 

      9.8 meters per second per second

  • 22. 
    If a projectile is fired straight up at a speed of 10 m/s, the total time to return to its starting position is about
    • A. 

      2 seconds

    • B. 

      20 seconds

    • C. 

      10 seconds

    • D. 

      1 second

    • E. 

      Not enough information to estimate

  • 23. 
    When a rock thrown straight upwards gets tot he exact top of its path, its
    • A. 

      Velocity is zero and its acceleration is zero

    • B. 

      Velocity is about 10 m/s and its acceleration is zero

    • C. 

      Velocity is zero and its acceleration is about 10 meters per second per second

    • D. 

      Velocity is about 10 m/s and its acceleration is about 10 meters per second per second

    • E. 

      None of these

  • 24. 
    A ball is thrown upwards. Neglecting air resistance, what initial upward speed does the ball need to remain in the air for a total time of 10 seconds?
    • A. 

      About 80 m/s

    • B. 

      About 60 m/s

    • C. 

      About 110 m/s

    • D. 

      About 100 m/s

    • E. 

      About 50 m/s

  • 25. 
    Which has a greater mass?
    • A. 

      An automobile battery

    • B. 

      A king-size pillow

    • C. 

      Neither- both have the same

  • 26. 
    Strange as it may seem, it is just as hard to accelerate a car on a level surface on the oon as it is here on the Earth. This is because
    • A. 

      The weight of the car is independent of gravity

    • B. 

      The mass of the car is independent of gravity

    • C. 

      Nonsense! a car is much more easily accelerated on the moon than on the Earth

  • 27. 
    The newton is a unit of
    • A. 

      Force

    • B. 

      Inertia

    • C. 

      Density

    • D. 

      Mass

  • 28. 
    A rock weighs 30 N on Earth. A second rock weighs 30 N on the moon. Which of the two rocks has the greater mass? (gravity on the moon is one-sixth of that on Earth)
    • A. 

      The one on the moon

    • B. 

      The one on Earth

    • C. 

      They have the same mass

    • D. 

      Not enough information to say

  • 29. 
    A 10-kg brick and 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is
    • A. 

      Zero

    • B. 

      The same as the force on the 1-kg book

    • C. 

      One-tenth as much

    • D. 

      10 times as much

  • 30. 
    The force of friction on a sliding object is 10 newtons. The applied force needed to maintain a constant velocity is
    • A. 

      Less than 10 N

    • B. 

      More than 10 N

    • C. 

      10 N

  • 31. 
    Whenever the net force on an object is zero, its acceleration
    • A. 

      Is zero

    • B. 

      May be less than zero

    • C. 

      May be more than zero

  • 32. 
    A 1-kg mass at the earth's surface weighs
    • A. 

      1 N

    • B. 

      4.9 N

    • C. 

      10.8 N

    • D. 

      9.8 N

    • E. 

      None of these

  • 33. 
    A 10-N falling object encounters 4 N of air resistance. The net force on the object is
    • A. 

      4 N

    • B. 

      10 N

    • C. 

      6 N

    • D. 

      0 N

    • E. 

      None of these

  • 34. 
    An object is propelled along a straight-line path by a force. If the net force were doubled, the object's acceleration would be
    • A. 

      Four times as much

    • B. 

      Half as much

    • C. 

      Twice as much

    • D. 

      The same

    • E. 

      None of these

  • 35. 
    An object is propelled along a straight-line path in space by a force. If the mass of the object somehow becomes twice as much, its acceleration
    • A. 

      Halves

    • B. 

      Doubles

    • C. 

      Quadruples

    • D. 

      Stays the same

    • E. 

      None of these

  • 36. 
    Hang from a pair of gym rings and the upward support forces of the rings will always
    • A. 

      Each be equal to your weight

    • B. 

      Add up to equal your weight

    • C. 

      Each be half your weight

  • 37. 
    A tow truck exerts a force of 3000 N on a car, accelerating it at 2 meters per second per second. What is the mass of the car?
    • A. 

      1500 kg

    • B. 

      500 kg

    • C. 

      1000 kg

    • D. 

      3000 kg

    • E. 

      None of these

  • 38. 
    An object following a straight-line path at constant speed
    • A. 

      Has zero acceleration

    • B. 

      Has a net force acting upon it in the direction of motion

    • C. 

      Has no forces acting on it

    • D. 

      None of these

  • 39. 
    Suppose a particle is being accelerated through space by a 10-N force. Suddenly the particle encounters a second force of 10 N in the opposite direction from the first force. The particle with both forces acting on it
    • A. 

      Theoretically tends to accelerate toward the speed of light

    • B. 

      Decelerates gradually to a halt

    • C. 

      Is brought to a rapid halt

    • D. 

      Continues at the speed it had when it encountered the second force

    • E. 

      None of these

  • 40. 
    • A. 

      4 times as far

    • B. 

      2 times as far

    • C. 

      1/2 as far

    • D. 

      1 1/2 times as far

    • E. 

      The same

  • 41. 
    If you are driving at 20 m/s and slam on your brakes and skid at 0.5 g (5m/s/s) to a full stop, the skidding time in seconds is
    • A. 

      About 5

    • B. 

      About 6

    • C. 

      About 4

    • D. 

      About 3

    • E. 

      More than 6

  • 42. 
    If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity, 
    • A. 

      The friction force increases

    • B. 

      The object accelerates opposite the direction of the applied force

    • C. 

      The object accelerates in the direction of the applied force

    • D. 

      Two of the above

    • E. 

      None of the above