1 / 6

Average Velocity

Average Velocity. Average speed is the distance traveled along its path divided by the time it takes to travel that distance Average velocity has both magnitude and direction + or – sign can signify the direction for linear motion. Instantaneous Velocity.

adamdaniel
Download Presentation

Average Velocity

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. Average Velocity • Average speed is the distance traveled along its path divided by the time it takes to travel that distance • Average velocity has both magnitude and direction • + or – sign can signify the direction for linear motion Physics 2 Kinematics in One Dimension - Christopher Chui

  2. Instantaneous Velocity • Instantaneous velocity at any moment is the average velocity over an infinitesimally short time interval: v = Dx/Dt as the limit Dt  0 • Instantaneous speed is always equal to the magnitude of the instantaneous velocity Physics 2 Kinematics in One Dimension - Christopher Chui

  3. Acceleration • Average acceleration is the change in velocity divided by the time taken to make the change • Instantaneous acceleration: a = Dv/Dt as the limit Dt  0 • Acceleration tells how fast the velocity changes • Velocity tells how fast the position changes Physics 2 Kinematics in One Dimension - Christopher Chui

  4. Motion at a Constant Acceleration • Uniform accelerated motion is when the magnitude of the acceleration is constant and the motion is in a straight line • v = vo + a*t a being constant • Average velocity = (vo + v)/2 a: constant • x = xo + vot + at2/2 a: constant • v2 = vo2 + 2a(x – xo) Physics 2 Kinematics in One Dimension - Christopher Chui

  5. Problem Solving • Read and reread the problem before solving it • Draw a diagram to show the situation • Write down what quantities are known and what are unknown • Think what principles of physics apply • Consider which equation relate the quantities involved • Perform the calculation • Do a rough estimate using the powers of 10 • Keep track of the units on both sides of the equation Physics 2 Kinematics in One Dimension - Christopher Chui

  6. Falling Objects • Galileo found that all objects, light or heavy, fall with the same constant acceleration, g • The distance traveled is proportional to t2 • Acceleration due to gravity = 9.80 m/s2 • Acceleration due to gravity is always downwards towards the center of the earth • Velocity and acceleration are not always in the same direction • a is not 0 even at the highest point • Linear motion can be solved by using a graph Physics 2 Kinematics in One Dimension - Christopher Chui

More Related