This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: CHAPTER 8 True or False 1. ____Calculating the range of motion at the hip joint during stair ascent after visually observing the movement is a quantitative analysis. T 2. ____The motion of a parachutist in the air is an example of translational motion. T 3. ____The x and y axes in a twodimensional rectangular reference system are always oriented vertically and horizontally, respectively. F 4. ____With a coordinate reference system originating at the hip joint, the axes of the coordinate system will always be horizontal and vertical. F 5. ____A 3D reference frame has three axes. T 6. ____Speed is a scalar quantity. T 7. ____Acceleration is defined as the time rate of change of position. F 8. ____Displacement is a scalar quantity. F 9. ____The slope of a line tangent to a curve indicates instantaneous velocity. T 10. ____Vectors can be added together graphically by placing the head of one vector at the tail of the other vector. T 11. ____The area under a displacementtime graph represents the average velocity. F 12. ____Positive acceleration always relates to the direction of motion away from the origin. F 13. ____The point where the velocity is maximum in a velocitytime graph indicates the point where acceleration is maximum. F 14. ____Velocity is a measure of the area under the positiontime curve. F 15. ____The steepness of the slope of a velocitytime curve is an indication of the magnitude of the acceleration. T 16. ____Stride length is measured from the heel contact of one foot to the heel contact of the other foot F 17. ____The support phase in walking accounts for the same percentage of the total cycle as running. F 18. ____Walking speed is increased by first increasing stride length and then stride rate. F 19. ____Successful sprinters can usually increase their acceleration at the end of the race. F 20. ____During running, stride length can affect metabolic cost. T 21. ____In a golf swing, the club head should be decelerating past contact with the ball. T 22. ____Maximum acceleration of the club head occurs at the moment of impact in a golf swing. F 23. ____Velocity of wheelchair propulsion is increased by increasing the length of the push on the wheel. F 24. ____Horizontal motion of a projectile is a special case of constant acceleration and determines, among other factors, the range of the projectile. T 25. ____Vertical velocity of a projectile is affected by gravity. T 26. ____Projectiles are never affected by air resistance. F 1. Convert the rectangular coordinates of (122,10) to polar coordinates. B a. (11.49, 4.69) b. (122.4, 4.69) c. (122.3, 85.3) d. (11.49, 85.3) 2. Convert the polar coordinates of (135, 182) to rectangular coordinates. C a. (4.71, 134.9) b. (134.9, 4.71) c. (134.9, 4.71) d. (4.71, 134.9) 3. Figure 811 depicts the path of a runner. If the runner starts and ends at the end of each block, and if each block is a square with lengths of 200 meters, what is the magnitude of the resultant displacement of the runner? C a. 1200m b. 1150mb....
View
Full
Document
This note was uploaded on 12/07/2011 for the course KIN 3514 taught by Professor Lili during the Fall '09 term at LSU.
 Fall '09
 LiLi

Click to edit the document details