الرابط ما رضي يفتح نزلي هنا السوال
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the speed v in m/s of a car given by v=bt^3 where the time t in seconds : the unit of b is :
m/s^4
ms
m/s
m/s^2
والحل كان الأول بشرح الدكتور :
(3) v=bt
3
======> b = v/t
3
======> [b] = [v]/[t
3
]= (L/T )/ T
3
= L/ T
4
= m/ s
4