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Question: show working1 an object is dropped out of a buildings...

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1) An object is dropped out of a building's window, landing after 3 s. What is the landing speed of the object, ignoring air resistance? 

 

 

2) A driver is driving at a velocity of 50 km/h. How long will it take him to stop the car if the maximum car deceleration when its braking is 7 m/s2, and the reaction time of the driver is 0.42 s. 

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