1 / 10

Chapter 2—Motion and Force

Chapter 2—Motion and Force. Section 1—Describing Motion Resource Science. Motion and Speed. Motion —occurs when an object changes its position *Motion doesn’t always have to be seen to have taken place. Distance and Displacement. Distance —describes how far something has moved

atune
Download Presentation

Chapter 2—Motion and Force

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. Chapter 2—Motion and Force Section 1—Describing Motion Resource Science

  2. Motion and Speed • Motion—occurs when an object changes its position • *Motion doesn’t always have to be seen to have taken place

  3. Distance and Displacement • Distance—describes how far something has moved • SI base unit to measure distance is METER • Displacement—the distance and direction of an object’s change in position from the starting point • See figure 2 on pg. 39

  4. Speed • Speed-the distance an object travels per unit of time • Ex: miles per hour/ feet per minute, etc. • Rate—any change over time, so-- • **Speed is a RATE • Equation: Speed = Distance / Time • (typically measured in m/s)

  5. Practice Calculating Speed-pg. 42-# 1 and 2 • *Most speeds aren’t constant, they either slow down or speed up • Averagespeed-describes speed of motion when speed is changing (driving on a 3 hr. trip) • InstantaneousSpeed-speed at a given point in time • Ex: speed on a speedometer

  6. Velocity • Velocity--includes the speed of an object AND the direction of its motion • *Velocity can change EVEN IF speed remains constant • Change inVelocity—can be EITHER a change in speed OR in direction of movement

  7. Remember: *To Calculate Velocity, it is the same as calculating speed, but you must also report a DIRECTION-north, south, east, west, etc. *One example of change in velocity—when a race car at a constant speed is rounding a curve, velocity is changing, due to direction of travel changing

  8. Section 2—Acceleration Acceleration-the rate of change of velocity (velocity = speed w/direction) When the velocity of an object changes, the object is accelerating So: Acceleration occurs when an object changes its SPEED, its DIRECTION or BOTH

  9. Acceleration: If speed is increasing = positive acceleration (acceleration) If speed is decreasing = negative acceleration (deceleration) Ex: horse on a carousel-acceleration due to direction only

  10. Amusement Park Acceleration: Wooden and steel roller coaster provide different thrills due to different materials Wooden-swaying effect Steel-more loops, steep inclines, drops, etc.

More Related