Review 5 (Angular Kinematics) Flashcards
During a baseball pitch, a pitcher’s arm rotates through 80 degrees of motion at the shoulder. If this is accomplished in 0.5 seconds, which of the following statements is true?
Question options:
1) Angular velocity is constant
2) Angular acceleration is constant
3) Both A and B
4) None of the above
None of the above
Range of motion at a joint is a measurement of which of the following?
Question options:
1) Angular displacement
2) Linear displacement
3) Linear velocity
4) Angular velocity
Angular displacement
Human body angles may be calculated using which of the following?
Question options:
1) Goniometer
2) Flexometer
3) Electrogoniometer
4) All of the above
All of the above (Goniometer, Flexometer & Electrogoniometer)
Why is anatomical knowledge important when using a goniometer?
Question options:
1) Location of joint centre determines placement of axis
2) Bone location affects position of the goniometer arms
3) Instant centre of a joint can change during movement
4) All of the above
All of the above (Location of joint centre determines placements of axis, Bone location affects position of the goniometer arms & Instant centre of a joint can change during movement)
If the knee joint goes through 100° of flexion during the down phase of a squat, which of the following is the total angular distance during 10 complete squats?
Question options:
1) 0°
2) 1000°
3) 2000°
4) None of the above
2000°
Which of the following is/are formula(s) for tangential acceleration?
Question options:
1) at = (vt - vt)/t
2) at = rα
3) Both formulas are correct.
4) Neither of the formulas is correct.
Both formulas are correct (at = (vt - vt)/t) & (at = rα)
Which of the following can contribute to the resultant linear velocity of a projectile at release?
Question options:
1) Radial acceleration
2) Tangential acceleration
3) Both tangential and radial acceleration
4) None of the above
Both tangential and radial acceleration
When observing someone lift a heavy object, which of the following is likely to be the angle of interest regarding back injury?
Question options:
1) Absolute angle of the knee
2) Relative angle of the trunk
3) Absolute angle of the trunk
4) Relative angle of the knee
Absolute angle of the trunk
A procedure for identifying the direction of an angular motion vector is called what?
Question options:
1) Right hand rule
2) Clockwise rule
3) Both A and B
4) No special procedure is needed.
Right hand rule
Which of the following is NOT a valid unit of angular velocity?
Question options:
1) Revolutions per minute
2) Gradients
3) Degrees per hour
4) Radians per second
Gradients
If the angular velocity of a batter’s shoulders increases, which of the following will happen to the linear velocity of the end of the bat?
Question options:
1) Increase
2) Decrease
3) End of the bat has no linear velocity
4) Stay the same
Increase
What does the letter “r” stand for in the equation v = rω?
Question options:
1) Radius of rotation
2) Revolution
3) Radian
4) Resultant
Radius of rotation
What is the angular acceleration of the second hand on a clock after one complete revolution?
Question options:
1) 6 deg/s
2) 0
3) 6 deg/s2
4) 60 deg/s2
0
Which of the following terms describes the location of the centre of rotation at a joint at a given instant in time?
Question options:
1) Precise centre
2) Exact centre
3) Instant centre
4) None of the above
Instant centre
A joint angle formed by adjacent body segments relative to each other is what type of angle?
Question options:
1) Obtuse angle
2) Acute angle
3) Absolute angle
4) Relative angle
Relative angle
A model airplane is being flown at the end of a cord 10 m long. If the speed of the airplane remains constant, but the cord is shortened to 7 m, which of the following will be the effect on the radial acceleration of the airplane?
Question options:
1) It will remain the same.
2) One must know the weight of the airplane in order to answer the question.
3) It will increase.
4) It will decrease.
It will increase.
An angle formed by a body segment with respect to horizontal is which of the following?
Question options:
1) Absolute angle
2) Acute angle
3) Relative angle
4) None of the above
Absolute angle
If angular acceleration is constant, then angular velocity must be
Question options:
1) Increasing or decreasing
2) Equal to zero
3) None of the above
4) Constant
Increasing or decreasing
Which of the following expressions defines angular velocity?
Question options:
1) Angular displacement divided by time
2) Change in angular position over a given time
3) Both A and B
4) None of the above
Both A and B (Angular displacement divided by time & Change in angular position over a given time)
If angular velocity is the same for both swings, which golf club will have a greater linear velocity at the club head, the driver (longer club) or the 9-iron?
Question options:
1) Equal linear velocity
2) Driver
3) 9-iron
4) Need more information
Driver
Which of the following are appropriate units for tangential acceleration?
Question options:
1) rad/s
2) m/s^2
3) rad/s^2
4) m/s
m/s^2
Which of the following terms describes the angle formed between the longitudinal axes of two adjacent body segments?
Question options:
1) The absolute angle
2) The relative angle
3) The static angle
4) None of the above
The relative angle
What rules have to be followed when using the formula v = rω?
Question options:
1) Units for ω have to be radian-based.
2) Units for v and r must the same base units (with time included in “v”).
3) Both A and B
4) There are no special rules.
Both A and B (Units for ω have to be radian-based & Units for v and r must the same base units [with time included in “v”].)
The formula v = rω establishes the relationship between which of the following?
Question options:
1) Linear and angular velocity
2) Linear displacement and linear velocity
3) Linear and angular displacement
4) Angular displacement and angular velocity
Linear and angular velocity
