1 / 13

Velocity & Acceleration

Velocity & Acceleration. M echanics - the study of the motion of objects. we focus on the language, principles, and laws that describe and explain the motion of objects Kinematics is the science of describing the motion of objects using words, diagrams, numbers, graphs, and equations.

hayley
Télécharger la présentation

Velocity & Acceleration

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. Velocity & Acceleration

  2. Mechanics - the study of the motion of objects. we focus on the language, principles, and laws that describe and explain the motion of objects • Kinematics is the science of describing the motion of objects using words, diagrams, numbers, graphs, and equations. • Kinematics is a branch of mechanics. • The goal of any study of kinematics is to develop sophisticated mental models that serve to describe (and ultimately, explain) the motion of real-world objects.

  3. Avoid memorizing the information; and avoid abstracting the information from the physical world that it describes and explains. • Rather, contemplate the information, thinking about its meaning and its applications. • your efforts should center on internalizing the meaning of the information.

  4. We will investigate the words used to describe the motion of objects. • scalars, vectors, distance, displacement, • speed, velocity and acceleration. • These words are used with regularity to describe the motion of objects. Your goal should be to become very familiar with their meaning.

  5. Scalar: a quantity that has only magnitude Vector : a quantity that has both magnitude and direction Vector or Scalar Scalar Length, area, volume Speed Mass, density Vector Displacement Velocity acceleration

  6. Scalarsare quantities that are fully described by a magnitude(or numerical value) alone.Vectors are quantities that are fully described by both a magnitude and a direction. • 5 m • 30 m/sec, East • 5 mi., North • 20 degrees Celsius • 256 bytes • 4000 Calories • Scalar • Vector • Vector • Scalar • Scalar • Scalar

  7. Speed and Velocity

  8. Example 1 A jogger has jogged 400. meters in 75 seconds. What is the jogger’s average speed? Speed = Distance/Time Speed = 400. m/75 seconds Speed = 5.3 m/s

  9. Displacement and Distance Distance: how much ground an object has covered during its motion. Displacement: the object's overall change in position.

  10. Example 2 A plane is traveling north with a velocity of 502 m/s. How long will it take to travel 3200 meters? Velocity = Displacement/Time Time = Displacement/Velocity Time = 3200 m /502 m/s Time = 6.4s

  11. Discuss and write in complete sentences • Why do we use velocity and displacement together or speed and distance together? • Compare and contrast • velocity and displacement are vectors • speed and distance are scalars

  12. What is the resulting displacement and distance of travel? The diagram shows several of coach's positions at various times. At each marked position, the coach makes a "U-turn" and moves in the opposite direction. In other words, the coach moves from position A to B to C to D.

  13. Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. • Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.

More Related