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Quiz by Dr. John Dayton

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Physics Quiz

INTRODUCTION: UNITS

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The background image is a sketch of the ill-fated Mars Climate Orbiter that burned up in the Martian atmosphere. The cause was two-fold: incorrect units were programmed for attitude control and a failure to assess and correct the problem while time permitted.

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1. Which of the following is not a fundamental physical quantity of the metric system?

C. Length

D. Weight

A. Mass

B. Time

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2. Which physical quantity is matched with its correct SI unit?

C. time - hr

D. distance - cm

A. mass - mg

B. speed - m/s

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3. What are the base units of the metric system?

C. meter, gram, second

D. pound, foot, second

A. centimeter, second, kilogram

B. mass, time, length

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4. Which list of units form the basis for all consistent units used in the SI system?

C. centimeter, gram, second

D. pound, foot, second

A. second, meter, kilogram

B. kilometer, gram, second

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5. How many cm2 are there in 1 m2?

C. 10

D. 100,000

A. 10,000

B. 100

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6. Given: [a] = m/s2, [v] = m/s, [x] = m, and [t] = s

Which of the following equations is dimensionally correct?

C. v = ax

D. x = at

A. a = vx

B. a = v2/x

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7. The value of every conversion factor is __________ .

C. 0

D. 1

A. is greater than 1 when converting to smaller units

B. is dependent on the units involved

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8. Matter is defined as __________ .

C. anything that can be acted upon by a force

D. anything that isn’t energy

A. anything that’s solid or can be made solid

B. anything that has mass and occupies space

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9. What is an object’s mass?

C. its energy

D. its inertia

A. its weight

B. its density

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10. What power of 10 is associated with the metric prefix G?

C. 10-6

D. 10-9

A. 109

B. 106

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11. What power of 10 is associated with the metric prefix m?

C. 103

D. 106

A. 10-6

B. 10-3

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12. What is the full name of the unit g?

C. milligram

D. microgram

A. megagram

B. macrogram

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13. What units are used in the cgs system of units?

C. centimeter, second, gram

D. meters, second, gram

A. second, milligram, meter

B. kilogram, centimeter, second

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14. Convert 50 miles per hour to m/s.

C. 1340.8 m/s

D. 73.3 m/s

A. 111.9 m/s

B. 22.4 m/s

This is the last question of this quiz.

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