Presentation on theme: "A Study of Speed, Velocity and Acceleration"— Presentation transcript:
1 A Study of Speed, Velocity and Acceleration MotionA Study ofSpeed,VelocityandAcceleration
2 To describe motion accurately a FRAME OF REFERENCEis necessary.A FRAME OF REFERENCE is a system of objects that are not moving with respectto one another.
3 What is Motion?When an object changes position in relation to a FRAME OF REFERENCE(an object that is not moving) we say that the object is in motionFor example, a car is in motion when it changes its position with a FRAME OF REFERENCE such as a tree.
4 When describing motion it is helpful to be able to describe how far an objected moved and which direction the object moved in.
5 Distance is the length of a path between two points. The distance of this car traveled on the track is 50 cm.
6 Displacementis the direction from the starting point and the length of a straight line from the starting point to the ending point.
7 DistanceandDisplacementare similarbut not the same.
49 (non-zero speed) and have no acceleration (think cruise control). You can be moving(non-zero speed) and have no acceleration (think cruise control).You can also be accelerating and not moving!A falling object begins accelerating the instant it is released.
50 An object is in free fall if it is accelerating due to the force of gravity and no other forces are acting on it.
51 The letter “g” is used for acceleration due to gravity. Falling objects increase their speed by 9.8 m/s every second, or 9.8 m/s2The letter “g” is used foracceleration due to gravity.