Download presentation

Presentation is loading. Please wait.

Published byAnsley Hardesty Modified over 3 years ago

2
MOTION speed, velocity and acceleration

3
Motion Notes— What is motion? Motion is relative Displacement vs. Distance Constant vs. Changing Motion Three possible motions

4
What is Motion? Motion occurs when an object changes position The position of the object depends on your frame of reference. A frame of reference refers to the stationary background to which the object’s position is compared.

5
Motion is relative Motion is relative to a chosen frame of reference. You at rest at your table…are you moving? Relative to the floor? Relative to the school building? Relative to the ground? Relative to the Sun? Relative to the Galaxy? Relative to the Universe? http://www.phy.ntnu.edu.tw/java/relativeVelocity/relative Velocity.htmlhttp://www.phy.ntnu.edu.tw/java/relativeVelocity/relative Velocity.html http://www.classzone.com/books/ml_science_share/vis_ sim/mfm05_pg7_relmotion/mfm05_pg7_relmotion.htmlhttp://www.classzone.com/books/ml_science_share/vis_ sim/mfm05_pg7_relmotion/mfm05_pg7_relmotion.html

6
Descriptions of Motion Relative motion—motion of objects as perceived from your frame of reference Linear motion—motion of objects moving in straight lines (opposite of non-linear) Constant motion—motion of objects in mechanical equilibrium (no change in motion) Changing motion—motion of objects that are accelerating

7
Displacement vs. Distance Displacement is the distance and direction of an object’s final position from its initial position. Distance is the length of the path that the object travels.

8
Three Possible States of Motion At rest Constant velocity (same speed and direction) Acceleration (changing speed and/or direction)

9
Describing Motion By definition By comparison By measurements By equations By graphs

10
SPEED IS… HOW FAST AN OBJECT MOVES. total distance covered divided by time it takes to cover that distance Speed equation v = d/t SI unit is meters/second (or m/s) Example… 40 m/s

11
VELOCITY IS… SPEED IN A GIVEN DIRECTION Speed is determined by the speed equation Direction of speed is described SI unit is m/s and direction example… 40 m/s east

12
ACCELERATION The rate of change in velocity over a period of time. SI unit is m/s 2 example… 4.5 m/s 2 or - 4.5 m/s 2 Positive means speeding up, negative means slowing down Velocity changes in two ways –#1: a change in speed (acceleration or deceleration) –#2: a change in direction (turning)

13
ACCELERATION EQUATION Acceleration = final velocity – initial velocity final time – intial time a = v f - v i t f - t i

14
GRAPHING SPEED Two types of graphs –Distance-time graphs –Velocity-time graphs

18
RELATIVE MOTION WEB SITES http://www.phy.ntnu.edu.tw/java/relativeVe locity/relativeVelocity.htmlhttp://www.phy.ntnu.edu.tw/java/relativeVe locity/relativeVelocity.html http://www.physicsclassroom.com/mmedia /kinema/kinemaTOC.htmlhttp://www.physicsclassroom.com/mmedia /kinema/kinemaTOC.html http://hyperphysics.phy- astr.gsu.edu/hbase/relmot.htmlhttp://hyperphysics.phy- astr.gsu.edu/hbase/relmot.html http://www.ii.metu.edu.tr/emkodtu/met106/l ectures/motion_in_2_and_3d/page9.htmlhttp://www.ii.metu.edu.tr/emkodtu/met106/l ectures/motion_in_2_and_3d/page9.html

19
RELATIVE MOTION Motion relative to your perspective or frame of reference. In order to see an object in motion, you need a perspective or frame of reference, such as a stationary background, for comparison.

Similar presentations

OK

MOTION IN A STRAIGHT LINE GRAPHICALLY. Equations of motion (Acceleration is constant)

MOTION IN A STRAIGHT LINE GRAPHICALLY. Equations of motion (Acceleration is constant)

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on personal swot analysis Ppt on english chapters of class 11 Mems display ppt online Ppt on channels of distribution of a product Ppt on trial and error definition Ppt on steps in curriculum development Ppt on abstract art techniques Ppt on water activity chart Ppt on six sigma green belt Ppt on mac os x lion