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A flower pot falls off a window sill and falls past the window below. It takes 0.30s to pass a window 3.45 m high. How far is the top of the window below upper window sill?​

Answer»

ime = t = 0.30 sDistance = S =3.45 mTo find:h =?Explanation:Let h be the height window sill from the ground.An object is following down from the window.∴ a = g =9.81Now, the object is following down from 3.45 m HIGH from the ground.By using the THIRD law of kinematical EQUATIONS = ut + 3.45 = u (0.30) + 0.5 × 9.81  ×0.30  × 0.30u = 25.8924∴ u = 25.89 m\sNow consider the object is following down from the window sill.v = 0 , s = h = ?By the third law of kinematics:0 = 25.89 × 25.89 + 2 × 9.81 × HH = -34.16 mA negative sign shows that object is following down to the ground.∴ h = 34.16 mA window sill is 34.16 m high from the ground.



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