Silently begin working on your morning article. If you finish early, you may read a book from the bookshelf.

Agenda: Week #5 HW due Friday Agenda: Week #5 HW due Friday! If you are missing assignments OR work go to hornetscience.weebly.com Warm Up Compare an object with a great amount of friction to an object with little amount of friction. Explain what friction is and why it is important. A force can be a _________ or __________. When an object is unbalanced, there is? How can you reduce friction? BONUS: The Bugatti is traveling 60 meters north and traveled that distance in 5 seconds. What is the Bugatti’s speed? 2. Push or pull. 3. a change in the motion or velocity of the object. 4. By making the surface smoother, by sanding it, or you can use a lubricant, such as oil or grease.

Brain Pop Video Read the questions before we watch the video for review. After the video, you will have five minutes to independently answer the questions in complete sentences. http://www.brainpop.com/science/motionsforcesandtime/accelerati on/ Username: Albemarleroad Password: mustangs

Speed Definition: The rate of motion. (how fast motion happens) Speed is the distance traveled in a given time. Ball 1 moved 5 meters in 2 seconds. (Slower speed) Ball 2 moved 10 meters in 2 seconds. (Faster speed)

Calculating Speed Speed = Distance ÷ Time Units: meters/seconds (m/s) miles/hour (mph) kilometers/hour (km/h)

Speed Triangles! D ÷ S T x

Notebook Title: Distance vs. Time Graphs Shows how speed relates to distance and time. Time is on the horizontal axis (x-axis) Distance is on the vertical axis (y-axis) Distance (meters) Time (seconds)

Interpreting Distance vs. Time Graphs As an object moves, the distance it travels increases with time. This can be seen as a climbing, or rising, line on the graph.

Interpreting Distance vs. Time Graphs A flat, straight line shows an interval of time where the speed is zero meters per second.

Interpreting Distance vs. Time Graphs Steeper lines show intervals where the speed is greater (faster) than intervals with less steep lines.

Calculating Slope The steepness, or slope, of the line is calculated by dividing the change in distance by the change in time for that time interval.

Calculating Speed from a Graph!

Lets Practice! How fast is the zebra walking during the first 20 seconds? Walk through steps on guided notes sheets!

You try! Solve the 4 practice problems on the back of your sheet! Low volume, hard work! Please silently raise your hand if you have any questions.

Exit Ticket All graphs must include a title. T/F Time is recorded on the y-axis. T/F A steep line shows the object slowing speeding up and slowing down quickly. T/F Provide examples of units of speed. Where is the origin?