Quiz

QUIZ

1. What is the standard international unit for displacement?

a. Kilometers b. Meters c. Feet d. Miles

Answer: b. The SI or (standard international) units for displacement are meters, although any of the other units might be listed, requiring a calculation to transfer the object from its displacement unit given to the unit of meters.

2. In remembering the prefixes of SI units, what would be the greatest measurement of distance?

a. Exameter b. Decameter c. Kilometer d. Centimeter

Answer: a. Exameter is the largest measurement of distance, being 1018 meters, which is the distance light travels in a century.

3. Which is the smallest unit of measurement among the listed ones here?

a. Exa b. Terra c. Pico d. Atto

Answer: d. The term atto refers to 10-18 of something; this is an extremely small number. For example, the term “attosecond” is the time it takes light to cross through an atom.

4. A ball is at 1 meter from a reference point and is moved 3 meters in one direction away from the reference point. What is the displacement arrow you will right?

a. Two units to the right b. Two units to the left c. Three units to the right d. Three units to the left

Answer: a. When determining the displacement, one uses the righthanded arrow to indicate movement away from a reference point. The units are the final position minus the initial position, leading to 2 meters to the right.

5. Which value is considered a vector?

a. Displacement b. Distance traveled c. Location d. Distance

Answer: a. Of these, only displacement is a vector. It is a magnitude and a direction, which can be positive or negative. The others represent the absolute value of something, which has a value but does not have a direction.

6. What is the SI unit for time in physics?

a. Hour b. Minute c. Millisecond d. Second

Answer: d. The SI unit for time in physics is the second. In cases where other time frames are used, you may need to use things like milliseconds or microseconds for small units of time or minute and hour for long periods of time.

7. What is the SI unit of acceleration?

a. Miles per hour squared b. Meters per hour squared c. Centimeters per millisecond cubed d. Meters per second squared

Answer: d. Acceleration is the change in velocity per second so its SI units will be in meters per second per second or meters per second squared.

8. Which of the following is not considered a vector?

a. Speed b. Velocity c. Displacement d. Acceleration

Answer: a. Each of these is a vector having a magnitude and direction, except for speed, which does not have a direction.

9. In determining the initial and final velocities, the times to get to certain distances, and acceleration, etcetera, of an object, which value is held constant in these types of equations?

a. Time b. Velocity c. Displacement d. Acceleration

Answer: d. For these types of equations, the acceleration of the object is held at a constant rate. This allows for the times, distances, and velocities to be calculated.

10. In problems related to the falling of objects, what is determined to be negligible?

a. Air resistance b. Mass of the object c. Acceleration d. Change in velocity

Answer: a. In problems related to falling objects, the effect of air resistance, which can be a factor in some situations, is determined to be negligible. The other factors are not negligible.