Chapter 4 Linear motion

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# Chapter 4 Linear motion - PowerPoint PPT Presentation

Chapter 4 Linear motion. 1) Linear means in a straight line. 2) Describe the motion of an object by its position, speed, direction and acceleration. 3) Distance is a scalar. Distance is “how much ground is covered” during motion.

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## PowerPoint Slideshow about 'Chapter 4 Linear motion' - montana-bush

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### 6) Motion is relative.An object is moving if its position relative to a fixed point is changing.

7) Example: A crate on a train traveling at 20 m/sec. The crate is at rest wrt the train.But the crate is moving 20 m/sec relative to the ground.

### 7) Speed is how fast an object is moving. Speed is a scalar quantity.

10) From motion experiments, Galileo defined Speed = distance/time11) Before Galileo, motion was simply described as “fast” or “slow”

12) Instantaneous speed is the speed at any instant.13) A speedometer shows instantaneous speed.

### 28) There are 6 kinematics variables and 2 kinematics equations

29)Kinematics variables for free falling object, Y = final position in y directionYo = initial position in y directionVoy = initial velocity in y directionVfy = final velocity in y directionay = -gt = time elapsed

1-D 1-D 2-D