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فیزیک دوم دبیرستان - انواع حرکت روی خط راست

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یکشنبه 28 خرداد 1391

انواع حرکت روی خط راست

نویسنده: محمد مهدی نوریزاده   طبقه بندی: فصل دوم، 

انواع حرکت روی خط راست

۱) حرکت یکنواخت روی خط راست

هرگاه سرعت لحظه ای متحرکی که بر روی خط راست حرکت می کند در تمام  لحظه ها یکسان باشد، حرکت آن حرکت یکنواخت نامیده می شود. در این حرکت نمودار مکان – زمان یک خط راست خواهد بود زیرا شیب خط   Δx/Δt تغییر نمی کند.

و سرعت در تمام لحظه ها مساوی با سرعت متوسط خواهد بود.

V = v¯ ® V =   ΔX/Δt 

ΔX = V Δt

 

اگر در لحظه t=0  فاصله متحرک تا مبدأ برابر x0 و در لحظه t برابر x باشد:

(x-x0)= v(t-0)

x = vt + x0 معادله حرکت یکنواخت

 

 

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