Download presentation

Presentation is loading. Please wait.

Published byJustus Harne Modified over 2 years ago

1
CHAPTER 2

2
Distance vs. Displacement Distance: How far an object has moved I ran 10 meters north and 30 meters south. How far did I run? Displacement: How far the object moved from the starting point What is my displacement in the previous problem?

3
Motion Distance- how far object moved Displacement- distance and direction the object moved from starting location Speed = distance / time (Don’t forget units) Ex: 5 m/s

4
Speed You travel 10 meters in 2 seconds. What was your speed? Your speed is 100 km/h and you’ve been driving for 5 hours. How far have you driven?

5
Average vs. Instantaneous Average speed = total d / total t Instantaneous speed = speed at that given second

6
Trickier problem Sound travels at 330 m/s. If a lightning bolt hits the ground 1 km away from you, how long will it take for the sound to reach you?

7
Speed vs. Velocity Speed = d / t Velocity = speed of object and direction of its motion

10
Acceleration Change in object’s velocity (speed and direction of motion) Increasing speed =positive acceleration Decreasing speed = negative acceleration Acceleration = change velocity / time Acceleration = (Vf – Vi) / t Don’t forget units! Ex: 5 m/s^2 Gravitational acceleration 9.8 m/s^2

11
Acceleration A jet airliner starts at rest at the end of the runway and reaches a speed of 300 m/s in 20 seconds. Calculate the acceleration.

12
Acceleration again A skateboarder is moving at a speed of 20m/s and comes to a stop in 2 seconds. Calculate the acceleration.

14
Force Push or pull on an object Gravity is a basic force Closer objects are together, the grav force between them increases

15
Balanced Force Net force = 0 Same force in opposite directions cancel each other out No movement

16
Unbalanced Force Unequal forces in opposite directions Movement occurs Net force = # in one direction Centripetal force = unbalanced force, with an object accelerating towards the center

17
Inertia Tendency of an object to resist a change in its motion Newton’s 1 st Law of Motion: an object moving at a constant velocity or at rest will remain that way unless it is acted upon by a force Why should we wear seatbelts?

Similar presentations

OK

Objectives: 1.Be able to distinguish between distance and displacement 2.Explain the difference between speed and velocity 3.Be able to interpret motion.

Objectives: 1.Be able to distinguish between distance and displacement 2.Explain the difference between speed and velocity 3.Be able to interpret motion.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on prime minister and his council of ministers Ppt on content development pros Ppt on data collection methods for qualitative research Ppt on web page designing Ppt on water cycle Ppt on bank lending regulations Ppt on magnetic levitation transportation Download ppt on newton's ring Ppt on conservation of wildlife and forests Ppt on cyclones in india