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Motion
Mr. SkirbstPhysical Science
Topic 03
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What is motion?
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What is motion?
motion is a change in position over a period of time
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Frame of reference
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Frame of reference
Object or backgroundwith which movement
is compared
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SPEED:
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SPEED:
rate at which an object moves
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SPEED:
rate at which an object moves
S = d / tS = speed; d = distance; t = time
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SPEED:
rate at which an object moves
S = d / tS = speed; d = distance; t = timeConstant speed – does NOT change over time
Average speed = TOTAL distance / TOTAL time
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Example: If an object moves 100 km in 5 hrs,what is its speed?
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VELOCITY
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VELOCITY
speed in a given direction
Ex. 10 km/hr east
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ACCELERATION
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ACCELERATION
Rate of change in velocity
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ACCELERATION
Rate of change in velocity
A = ( Vf – Vo ) / tA = accelerationVf = final velocityVo = original velocityT = time
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Example:A car is able to reach 100 km/hr (east) in 5 seconds from a starting line. What is its acceleration?
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MOMENTUM
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MOMENTUM
how difficult it is to startor stop an object
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MOMENTUM
how difficult it is to startor stop an object
M = (m) (v)M = momentumm = massv = velocity
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Example:A truck has a mass of 10,000 kg and ismoving at a velocity of 100 km/hr.What is its momemntum?
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