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Unit 2 Quiz#1


Fgrav = m*g
Fnet = m*a
a = (Change in vel)/time

Ffrict = "mu" * Fnorm
ave. vel. = displacement/time
g = 10 m/s/s (on Earth)


1. The standard metric unit for force is the Newton (abbrev. N). The standard metric unit for mass is the kilogram (abbrev. kg). The standard metric unit for distance is the meter (abbrev. m). The standard metric unit for time is the second (abbrev. s). Thus, in the metric system the following unit equivalency exists:

1 N = 1 kg m/s2

In the Martian system of measurement, the standard unit for force is the liddy; the standard Martian unit for mass is the loon; the standard Martian unit for distance is the gooly; and the standard metric unit for time is the spike. Write an equation which relates the liddy to Martian units of mass, distance, and time.


2. Consider the following staements and corresponding free-body diagrams. Read the statement and fill in all the blanks in the diagram.

A 20-kg box is gliding towards the right across the floor with an acceleration of 1 m/s2, left.

Fnet = _______

a = 1 m/s2, left

A 1000-kg unoccupied elevator, supported by a large cable, is ascending upward with a constant velocity of 3.0 m/s, up.

Fnet = _______

a = _______

Useful Web Links

Types of Forces (8 seconds)

Determining the Net Force (11 seconds)

Finding Acceleration (6 seconds)

Finding Individual Forces (7 seconds)


3. Big Bubba weighs 1000 N on Earth. The acceleration of gravity on the moon is one-sixth of the value on Earth. What is Big Bubba's mass on the moon? Explain or support your answer.

Useful Web Links

Mass vs. Weight (8 seconds)


4. Anna Litical is conducting a ticker tape experiment in which she is studying the mathematical relationship between the position and time of a moving toy car. Anna plots two graphs of her data (shown below). Use the graphs to answer the following questions.



a. Write an equation which mathematically relates the position of the car to the time.


b. Is the toy car undergoing an acceleration? ________ Clearly explain how you know.


c. Determine the position of the car after 4.0 seconds. PSYW


Useful Web Links

The Meaning of Slope for a p-t Graph (8 seconds)

Determining the Slope on a p-t Graph (7 seconds)


5. The velocities and masses of four objects are shown. Which one of the following objects has the greatest inertia? Please circle your answer.

Useful Web Links

Inertia and Mass (12 seconds)


6. A force of F on a mass M causes an acceleration of 16 m/s2. What acceleration will result from a force of one-half F on a mass of one-fourth M?

Useful Web Links

Newton's Second Law (9 seconds)


7. An 5.0-kg object is moving northward along a level surface and is undergoing an acceleration at a constant rate. Velocity-time data for the object is shown below. Utilize this data to answer the following questions.


(m/s, North)



  1. Determine the acceleration of the object. PSYW


  2. Determine the net force which is acting upon the object. PSYW


  3. In which direction does the net force act? ______________ Explain how you know.


  4. Which of the following free-body diagrams would provide an appropriate description of the forces acting upon this moving object? There may be more than one answer. Circle any appropriate diagram(s). Assume that the object is moving to the right. Clearly explain what is wrong with any inappropriate diagram(s).


Useful Web Links

Acceleration (12 seconds)

Fnet = m*a (9 seconds)

Direction of Fnet and Acceleration (9 seconds)

Types of Forces (8 seconds)

The Big Misconception (9 seconds)



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© Tom Henderson, 1996-1999

Glenbrook South High School.

Last updated on 9/25/98.