Answer to Question #166009 in Physics for Jjj

Question #166009

The speed of a car is decreased uniformly from 30. meters per second to 10. meters per second in 4.0 seconds. The magnitude of the car's acceleration is

Expert's answer

"a=\\dfrac{|v_f-v_i|}{t}=\\dfrac{|10\\ \\dfrac{m}{s}-30\\ \\dfrac{m}{s}|}{4\\ s}=5\\ \\dfrac{m}{s^2}."

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