Motion. Motion- the change in the position of an object with respect to time and its reference point Motion is RELATIVE Reference point/ frame of reference:

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Presentation transcript:

Motion

Motion- the change in the position of an object with respect to time and its reference point Motion is RELATIVE Reference point/ frame of reference: a point/object that is not moving

Reference Point and Relative Motion Example: -If you are sitting on a train looking at your neighbor, neither of you seem to be moving -If you look out the window at people standing on the side, they seem to be moving backwards -If the people on the side are looking at you, you seem to be moving forward

Describing Motion Distance- the length between two points – Units: meters, kilometers, etc. Time

Speed Speed- is the distance traveled per unit of time – Units: m/s, km/s, etc. S= speed D = distance t= time Solve for other variables : D= s*t t= D/s Formula: S = D/t

Average Speed The total distance divided by the total time

Instantaneous Speed The speed at any given instant

You must always show your work and units!!  ALWAYS METRICS No answer is complete without units!

Let’s try one! Calculate the speed of a dog running through a field if he is covering 23.7 meters in 54 seconds. Given:Formula: Find: Work Space:

If a cross country runner covers a distance of 347 meters in 134 seconds what is her speed? Given:Formula: Find: Work Space:

Velocity Velocity- The speed and direction an object is moving in Units: speed and a direction Example: The car’s velocity is 60 km/hr EAST

Try This: Calculate the velocity of a dog running north through a field if he is covering 23.7 meters in 54 seconds. Given:Formula: Find: Work Space: