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Speed

Speed. BC Science Probe 10 Section 12.2 Pages 347-350. Speed. The speed of an object is equal to the distance an object travels divided by the time interval. Speed. Δ d = change in distance Δ t = time interva l. Speed. For example:

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Speed

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  1. Speed BC Science Probe 10 Section 12.2 Pages 347-350

  2. Speed • The speed of an object is equal to the distance an object travels divided by the time interval.

  3. Speed Δ d = change in distance Δ t = time interval

  4. Speed • For example: • If a car travels 120 km in 2 hours, we can say that the speed = 120 km/2 hours • The car’s speed is 60 km/hour

  5. Average Speed • The average speed of an object is the total distance travelled divided by the total time taken.

  6. Average Speed • Vav= average speed • df = final position • di = initial position • tf = end time • ti = start time

  7. Average Speed • When working on problems about speed, all distance measurements need to be in the same units, as do all time measurements. • So if one measurement is in m and other in km, one of them needs to be converted.

  8. Instantaneous Speed • This is the speed of an object at a particular instant in time.

  9. Constant Speed • If the speed of an object is constant or does not change, its average speed will be the same as its instantaneous speed. • An object has constant speed if its speed is not changing. • Example: • light

  10. Assignment • CYU page 350 • #1,3,4,5,7,9,13,14 • Show your work!

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