Oblicz prędkość początkową rowerzysty, jezeli w ciągu 10 sekund osiagnał prędkość 45 km/h z przyspieszeniem 1m/s2
dane:
t = 10 s
v = 45 km/h = 45*1000m/3600s = 12,5 m/s
szukane:
vo = ?
v = vo + at
vo = v - at = 12,5m/s - 1m/s²*10s = 12,5 m.s - 10 m/s
vo = 2,5 m/s
-----------------
t= 10s
Vk = 45km/h= 45*1000/3600= 450/36= 12,5m/s
a= 1m/s²
a= Vk-Vp/t
1m/s²= 12,5m/s-Vp/10s
12,5-1*10
12,5-10
Vp= 2,5m/s
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dane:
t = 10 s
v = 45 km/h = 45*1000m/3600s = 12,5 m/s
szukane:
vo = ?
v = vo + at
vo = v - at = 12,5m/s - 1m/s²*10s = 12,5 m.s - 10 m/s
vo = 2,5 m/s
-----------------
t= 10s
Vk = 45km/h= 45*1000/3600= 450/36= 12,5m/s
a= 1m/s²
a= Vk-Vp/t
1m/s²= 12,5m/s-Vp/10s
12,5-1*10
12,5-10
Vp= 2,5m/s