Motion

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# Motion - PowerPoint PPT Presentation

Motion. 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:

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## PowerPoint Slideshow about 'Motion' - irene-ramsey

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Presentation Transcript

### Motion

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.

Formula:

S = D/t

• Solve for other variables:

D= s*t

t= D/s

S= speed

D = distance

t= time

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: