Physics 160 � Biomechanics Test #1 by cFaK66o

VIEWS: 0 PAGES: 5

									                              Physics 160 – Biomechanics Test #1
                                         Jan. 26, 2009

Instructor: Dr. Julie Alexander                 Name____________________

For the multiple choice questions (1 mark each), circle your answer. For the long answer
questions (20 marks total) show all of your work and put a box around your final answer. Part
marks will be awarded for the long answer questions only.

1) What term is given to considerations such as the size, shape, and mass of body segments?
   a) Cybernetic
   b) Anthropometric
   c) Kinematic
   d) Kinetic

2) Which of the following statements is true regarding qualitative analysis?
   a) It is always of a general nature.
   b) It does not involve the use of numbers.
   c) Both a) and b)
   d) Neither a) nor b)

3) The frontal plane divides the body into equal _________
   a) Right and left halves
   b) Front and back halves
   c) Top and bottom halves
   d) Medial and lateral halves

4) Movements in the transverse plane occur around which axis?
   a) Frontal
   b) Sagittal
   c) Longitudinal
   d) Horizontal

5) Elbow extension takes place in what plane?
   a) Sagittal
   b) Frontal
   c) Transverse
   d) Longitudinal

6) A dancer performs a pirouette in which plane?
   a) Sagittal
   b) Frontal
   c) Transverse
   d) Longitudinal

7) The hip joint relative to the knee joint is ___________
   a) Proximal
   b) Medial
   c) Superior
   d) Anterior



                                                                                                1
8) Which of the following motions occurs primarily in the sagittal plane?
   a) Running
   b) A cartwheel
   c) A pirouette
   d) All of the above

9) Which of the following is not a kinematic quantity?
   a) distance
   b) displacement
   c) acceleration
   d) force

10) What is the speed of a cyclist who covers 5 miles in 30 minutes?
    a) 5 mi/h
    b) 10 mi/h
    c) 30 mi/h
    d) 60 mi/h
11) Which of the following affects the time that a horizontally projected object remains in the
    air?
    a) Weight
    b) Mass
    c) Projection height
    d) All of the above

12) Acceleration is defined as the time rate of change of position.
    a) True
    b) False
13) Which component of the velocity of a projectile is affected by gravity?
    a) Vertical
    b) Horizontal
    c) Both a) and b)
    d) Neither a) nor b)
14) What factor differentiates scalar quantities from vector quantities?
    a) Magnitude
    b) Direction
    c) Force
    d) Acceleration
    e) It depends on the application
15) During the end of a 100 m race, a runner's acceleration is negative. Which statement
    accurately interprets this observation?
    a) The runner is slowing down while moving in the positive direction.
    b) The runner is speeding up while moving in the negative direction.
    c) The slope of the velocity vs. time plot is positive
    d) The runner is slowing down while moving in the negative direction

16) Suppose a ball is thrown straight up. Make a statement about the velocity and the
    acceleration when the ball reaches the highest point
    a) Its velocity is not zero and its acceleration is zero.
    b) Its velocity is zero and its acceleration is not zero
    c) Neither its velocity nor its acceleration is zero
    d) Both its velocity and its acceleration are zero


                                                                                                  2
17) A swimmer swims at 2 m/s due north across a river. The velocity of the river’s current is east
    at 0.6 m/s. What is the magnitude and direction of the swimmer’s resultant velocity?
    (4 marks)




18) A volleyball is bumped vertically up with an initial velocity of 15 m/s.
    a) How long does it take for the ball to reach the peak height? (3 marks)




    b) If the ball is 1m above the ground when it leaves the player’s arms how high will the ball
       rise above the ground? (3 marks)




                                                                                                3
19) A shot putter releases the shot at an angle of 42o from a height of 2.1 m with a velocity of
    14 m/s. Find the range of the shot. (5 marks)




Refer to the graph given below to answers the following questions. (1 mark each)




20) What is the acceleration at t=1s? ___________________________


21) What is the acceleration at t=3s? _______________________________


22) When does the object turn around? ___________________________


23) Is the object speeding up or slowing down between t=6s and t=8s? ______


24) Which direction is the object moving between t=4s and t=6s?____________




                                                                                                   4
Answers:
1) B
2) B
3) B
4) C
5) A
6) C
7) A or C
8) A
9) D
10) B
11) C
12) B
13) A
14) B
15) A
16) B
17) 2.09 m/s at 73.3o
18) ..
    a) 1.53 s
    b) 12.5 m
19) 21.99 m
20) 10m/s2
21) 0
22) 6 s
23) Speeding up
24) Right




                        5

								
To top