JQuiz Instructions

1. Energy is neither created nor destroyed.

   1.   ?    True
   2.   ?    False

2. Convert 75 grams to kilograms.

   1.   ?    .75 kg
      
   2.   ?    .075 kg
   3.   ?    7.5 kg
   4.   ?    75 kg

3. How do you read a ruler?

   1.   ?    Note the location of the end of the object measured against the scale and round to the nearest higher order scale mark.
   2.   ?    Note the location of the end of the object and record the nearest marking.
   3.   ?    Note the location of the end of the object and record to the nearest 1/10th of a scale division.

4. What do we measure with a balance?

   1.   ?    force
   2.   ?    mass
   3.   ?    acceleration
   4.   ?    velocity

5. What do we measure with a scale?

   1.   ?    force
   2.   ?    mass
   3.   ?    acceleration
   4.   ?    velocity

6. What must be known to determine mechanical work?

   1.   ?    time and velocity
   2.   ?    power and force
   3.   ?    force and distance

7. The rate at which work is done is known as:

   1.   ?    velocity
   2.   ?    acceleration
   3.   ?    momentum
   4.   ?    power

8. Express 75,000 in scientific notation (n.n e n)

   1.   ?    7.5 e 4
   2.   ?    75 e 3
   3.   ?    75 e - 3
   4.   ?    .75 e 5

9. Express .00075 in scientific notation.

   1.   ?    7.5 e 3
   2.   ?    7.5 e 1
   3.   ?    7.5 e -4
   4.   ?    7.5 e -5

10. Find the density of a 40 kg object of volume 0.2 m^3.

    1.   ?    .005 kg/m^3
    2.   ?    200 kg/m^3
    3.   ?    8 kg/m^3

11. The time rate at which position changes is called:

    1.   ?    velocity
    2.   ?    acceleration
    3.   ?    momentum
    4.   ?    force

12. The time rate at which velocity changes is called:

    1.   ?    velocity
    2.   ?    acceleration
    3.   ?    force
    4.   ?    momentum

13. The time rate at which momentum changes is called:

    1.   ?    velocity
    2.   ?    acceleration
    3.   ?    momentum
    4.   ?    force

14. One synonym for mass is

    1.   ?    force
    2.   ?    inertia
       
    3.   ?    momentum
    4.   ?    acceleration

15. Inertia is

    1.   ?    the rate of change of momentum
    2.   ?    an inverse relation
    3.   ?    the amount of force required to cause acceleration
    4.   ?    the resistance of an object to acceleration

16. Data is graphed -- the result is a diagonal line with a slope of +2.5 that goes throught the origin. The independent and dependent variables are:

    1.   ?    directly proportional
    2.   ?    inversely proportional
    3.   ?    independent

17. Data is graphed. The graph produces a horizontal line. The relationship is one of:

    1.   ?    direct proportion
    2.   ?    inverse proportion
    3.   ?    independence

18. Data is graphed. The result is a hyperbola (at least the part which lies in the first quadrant). The relationship is:

    1.   ?    direct proportion
    2.   ?    inverse proportion
    3.   ?    independence

19. Find the kinetic energy for a 2 kg mass traveling at 10 m/s.

    1.   ?    100 J
    2.   ?    20 J
    3.   ?    200 J
    4.   ?    50 J

20. A 50 N horizontal force is used to keep a box sliding across the floor at constant speed. What is the force of friction on the box?

    1.   ?    It depends on the mass of the box.
    2.   ?    It depends on the mass of the person pushing.
    3.   ?    50 N
    4.   ?    both a and b