Kines 101 Exam 2 (practice exams, quizzes,
clicker questions) Questions And Answers
100% Pass
The study of anatomy was furthered during the Renaissance by artists who sought more realistic
depictions of the human form.
- True
- False - answerTrue
Henry Gray published a classic anatomy text i...
- False - answer✔True
If you start with your right arm hanging down at your side and then perform an abduction of the
right shoulder, your right arm will be confined to the frontal plane.
- True
- False - answer✔True
The right elbow is proximal to the right wrist
- True
- False - answer✔True
A runner completing the 100 m dash in typical fashion (running in a straight line; no running
start; runs through the finish line) must have an instantaneous velocity at the finish line that is
twice his average velocity for the race.
- True
- False - answer✔False
Average velocity is total displacement (change in position) divided by total time, in this case 100
m divided by the race time. It has no relation to the instantaneous velocity, which is the velocity
at any one point in time.
Resist the temptation to find an average velocity by taking the average of two velocities.
For a runner completing the 100 m dash in typical fashion, the instantaneous acceleration could
be zero one second before the runner finishes the race.
Zero acceleration signifies a constant velocity, and it's possible that the runner's forward velocity
is not changing late in the race. It's also possible that the velocity is decreasing, which would be
a backward acceleration (or a negative acceleration if we say that forward means positive).
Be careful about confusing acceleration (how fast velocity is changing) with velocity. A runner
can have a zero acceleration without having zero velocity.
A runner's forward velocity may be expressed in meters per second squared
- True
- False - answer✔False
Velocity is change in position (measured in m) divided by the time it takes to change position
(measured in s), so the units of velocity will be m/s. You would measure how fast velocity
changes (also called acceleration) using meters per second squared. Another way to think of this
is that acceleration is an expression of how many meters per second your velocity changes by
every second. This is meters per second per second, or meters per second squared.
Which of these could be the length of a Penn State student's foot?
- 2.7 m
- 0.27 m
- 27 mm
-0.027 km - answer✔0.27 m
A patient in hand therapy completes a reaching task in which his fingertip moves 32 cm along a
straight path in 400 ms. What is the fingertip's average velocity during the movement?
(hint: All the answers below are in m/s, so it would be a good idea to convert centimeters (cm) to
meters and milliseconds (ms) to seconds before computing velocity)
- 0.8 m/s
- 1.25 m/s
- 1.5 m/s
- none of the above answers is correct - answer✔0.8 m/s
To find average velocity we divide displacement D by time T. To find velocity in m/s, we'll
express displacement in m and time in seconds before we take the quotient. D = 32 cm = 0.32 m,
and T = 400 ms = 0.400 s. Dividing, we get Vavg = 0..400 = 0.8 m/s.
Find the body mass in SI units for a patient who weighs 143 lbs. Round to the nearest kg.
- 65 kg
- 82 kg
- 398 kg
- none of the above answers is correct - answer✔65 kg
An object that has a mass of 1 kg weighs 2.2 pounds. To convert pounds to kg, multiply by a
form of 1 (fraction equal to one) that makes pounds cancel and leaves you with kg. The form of 1
you'll use here is (1 kg /2.2 lbs). 143 lbs * (1 kg /2.2 lbs) = 65 kg.
A man begins walking in a straight line by starting from rest (velocity of zero). By the time he
has been walking for 3.0 s, his forward velocity is 1.5 m/s. What is the magnitude of the man's
average acceleration during this time?
- 0.0 m/s/s
- 0.4 m/s/s
- 0.5 m/s/s
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