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OpenStudy (anonymous):

A car starts from rest and travels for 6.0 s with a uniform acceleration of +1.3 m/s2. The driver then applies the brakes, causing a uniform acceleration of -2.3 m/s2. The breaks are applied for 1.50 s. How fast is the car going at the end of the braking period? How far has the car gone from its start?

6 years ago
OpenStudy (anonymous):

For acceleration. v=at = 7.8 m/s displacement from origin = s1 = at^2/2 = 19.4 m For retardation v = u+at Here u=7.8 and a=-2.3 v=4.35 m/s displacement from s1 = s2= ut+at^2/2=9.1 m Displacemnt from origin = s1+s2=28.5m

6 years ago
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