1 / 10

Motion

Motion. Process of a change in position Space and time Linear motion Rectilinear motion Curvilinear motion Angular motion General motion. Distance & Displacement. Distance Measured along the path of motion Scalar quantity Linear displacement Measured in a straight line

jamal
Download Presentation

Motion

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Motion • Process of a change in position • Space and time • Linear motion • Rectilinear motion • Curvilinear motion • Angular motion • General motion

  2. Distance & Displacement • Distance • Measured along the path of motion • Scalar quantity • Linear displacement • Measured in a straight line • Resultant displacement • Vector quantity • Direction of a displacement relates the initial position to the final position • Direction can be left, north, positive, down

  3. Velocity Displacement that occurs during a given period of time The rate of change in location Don’t need to know the path of direction! v = change in position / change in time v = position 2 - position 1 / time 2 - time 1 Speed Distance covered divided by the time taken to cover it speed = distance / change in time Must know the path of direction! Velocity & Speed

  4. Linear Acceleration • The change in velocity occurring over a given time interval a = change in velocity / change in time a = velocity 1 - velocity 2 / change in time Velocity 1 = velocity at one point Velocity 2 = velocity at a later point • Units are m.sec2

  5. Average vs Instantaneous Velocity • Instantaneous velocity • Immediate measurement during initial movement • Tremendous effect on distance to be traveled by the object • Average velocity • Final displacement divided by the total time • Female HS sprinters • Maximum velocities occurred at 23 to 27 meters from the start • Elite track athletes • Maximum velocities occur from 40 to 60 meters • Why?

  6. Kinematic data analysis • Track example • Table 2.1 (pg 58) • Interval times • Table 2.2 (pg 58) • Average speeds

  7. Kinematics of Projectile Motion • Vertical component • Gravity • Gravitational acceleration • Maximum height of object obtained • Figure 2.6 • Horizontal component • Distance the object travels • Air resistance • Clothing, equipment, etc. • Figure 2.7

  8. Projectile • Object that has no external forces acting on it other than gravity. • Newton’s 1st law • Horizontal velocity of a projectile is constant • Horizontal motion is in a straight line

  9. Factors Affecting Projectile Trajectory • Angle of projection • Affects the shape of the projectile’s trajectory or path • Don’t forget air resistance • Projection speed • Determines length or size of a projectile’s trajectory • Table 10-2 combines the effects of projection angle and speed • Relative height of projection • Initial height minus landing height • You can have a negative relative projection height

  10. Optimum Projection Conditions • Each individual sporting event has its keys: • Throwing events • *Speed of projection (more important) • Relative projection height • Shot put release angles for the elite (36 to 37 degrees) • Long jump • *Speed of projection • Angle of projection • Jump angles range from 18 to 27 degrees for the elite • High jump • *Angle of projection • Speed of projection (horizontal velocity affects this) • Take-off angles range from 40 to 48 degrees

More Related