Motion Mr. Skirbst Physical Science Topic 03. What is motion?

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Presentation transcript:

Motion Mr. Skirbst Physical Science Topic 03

What is motion?

motion is a change in position over a period of time

Frame of reference

Object or background with which movement is compared

SPEED:

rate at which an object moves

SPEED: rate at which an object moves S = d / t S = speed; d = distance; t = time

SPEED: rate at which an object moves S = d / t S = speed; d = distance; t = time Constant speed – does NOT change over time Average speed = TOTAL distance / TOTAL time

Example: If an object moves 100 km in 5 hrs, what is its speed?

VELOCITY

speed in a given direction Ex. 10 km/hr east

ACCELERATION

Rate of change in velocity

ACCELERATION Rate of change in velocity A = ( V f – V o ) / t A = acceleration V f = final velocity V o = original velocity T = time

Example: A car is able to reach 100 km/hr (east) in 5 seconds from a starting line. What is its acceleration?

MOMENTUM

how difficult it is to start or stop an object

MOMENTUM how difficult it is to start or stop an object M = (m) (v) M = momentum m = mass v = velocity

Example: A truck has a mass of 10,000 kg and is moving at a velocity of 100 km/hr. What is its momemntum?