Speed Velocity INTEGRATED SCIENCE Motion Reference frame observing

Speed & Velocity INTEGRATED SCIENCE

Motion Reference frame – observing objects in motion in relation to other objects that stay in place Examples: the ground, trees, a bus/car Change in position relative to a reference point

Distance vs. Displacement Distance – the path of length an object travels Meters (m) Displacement - distance and direction of an objects change in position from the starting to ending point Direction given – up, down, north, south, east, west, left, right 20 miles south, 4 yards to the left, 6 feet north

Speed & Velocity

Speed or Velocity Bob walks 1. 5 m/s. Bob A bus is traveling 33 m/s A A walks 1. 5 m/s south towards the bus stop. bus is traveling 33 m/s northeast into town racecar passes a police officer traveling 96 m/s A racecar passes a police officer traveling 96 m/s east of the race track.

Velocity examples A motorist travels 406 km during a 7. 0 hr period. What was the average speed in km/hr The horse racing record for a 1. 50 mi. track is shared by two horses: Fiddle Isle, who ran the race in 143 s on March 21, 1970, and John Henry, who ran the same distance in an equal time on March 16, 1980. What were the horses' average speeds? If I can walk at an average speed of 5 km/h, how many miles can I walk in two hours?

Domino Lab Question: what distance apart will result in a higher speed in dominoes?

Each group sets up 10 dominoes at 3 varying distances apart from each other. Measure the total distance/length of the dominoes. Push the dominoes over so they fall one at a time. The groups time how long it takes all the dominoes to fall. Conduct Record at least 3 trial for each domino all data in table calculate the speed of the dominoes at the different spacing's

Spacing = 1 cm Trial Total length Time (s) (cm) Speed (cm/s) 1 2 3

Reflection How does the spacing between the dominoes affect the speed? Is it what you expected? Draw a graph of the total distance verse the time for each total length.