EXSS 323 Midterm Objectives

• Know cardinal planes of motion and their axes of rotation; be able to identify motions that occur in the various planes.

• Be familiar with anatomical movement terminology.

• Be familiar with the concept of Degrees of Freedom; know the number of degrees of freedom for major joints of the body.

• Be familiar with units of measurement used in biomechanics.

• Be familiar with vectors and scalars. In particular, know how to perform mathematical operations with vectors, including:
      Vector Resolution
      Vector Composition
      Vector Addition, both graphically (head-to-tail) and mathematically (trigonometry)

• Know the difference between position, distance, and displacement.

• Know the difference between speed and velocity.
  
  

• Know what is meant by positive and negative acceleration.
  
  

• Know how to calculate instantaneous velocities using first central differencing.

• Know the significance of the slope of position-time graphs, velocity-time graphs, angular position-time graphs, and angular velocity-time graphs.

• Know how stride length and stride rate vary with increasing running speed.

• Know the significance of the area under acceleration-time graphs, velocity-time graphs, angular acceleration-time graphs, and angular velocity-time graphs.

• Know how to use projectile equations to solve projectile problems

• Vertical Motion	Horizontal Motion
  vyf = vyi - gt hf = hi + vyit - ˝gt2	x = xi + vxt if we assume that xi = 0, then x = vxt
  Combination of the above equations yields a 3rd equation vyf2 = vyi2 - 2g(hf - hi)
  g = 9.81 m/s2

• Know the characteristics of projectile trajectories.

  Parabolic - apex is highest point
  v_y before apex > 0  |  v_y @ apex = 0  |  v_y after apex is < 0
  v_x constant

• Know how high and how far projectiles travel.

• Know what angular motion is, and its significance.

• Be familiar with angular kinematic quantities.

• Be familiar with the relationship between linear and angular motion.

• Be familiar with solving angular kinematic problems.

• Similarity of Linear and Angular Kinematics

There will be some math problems and some short answer problems on the test.

Expect a projectile problem, a linear kinematics problem, and an angular kinematics problem.

Expect that the projectile problem will require some vector manipulation.

If you can solve the problems on the sample problem sheets in your student packet, you will have no difficulties with the problems on the test.

Make sure you bring your calculator and your formula sheet.