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OpenStudy (anonymous):

@alexrobin13 In which situation is the acceleration of the car negative? A) The velocity of a car was 75 km/h over 4 hours. B) The velocity of a car reduced from 50 km/h to 35 km/h over one minute. C) The velocity of a car increased from 40 km/h to 75 km/h over 15 minutes. D) The velocity of a car was 45 km/h at 2:00 pm and at 4:00 pm the velocity of the car was 85 km/h.

OpenStudy (alexrobin13):

B a=deltav/deltat a=(35-50)/1 a=-15km/m

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