Acceleration.ppt
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1、Acceleration,Acceleration Slope of V-T 1,Graphics from Minds On Physics,Acceleration Slope of V_T - 2,Graphics from Minds On Physics,Speeding Up & Slowing Down,Negative acceleration can mean speeding up or slowing down. The same is true with positive acceleration.,Graphics from Minds On Physics,Posi
2、tion Time for Constant Acceleration,Graphics from Minds On Physics,Positive Velocity Positive Acceleration,Graphics from Minds On Physics,Positive Velocity Negative Acceleration,Graphics from Minds On Physics,Negative Velocity Negative Acceleration,Graphics from Minds On Physics,Negative Velocity Po
3、sitive Acceleration,Graphics from Minds On Physics,Acceleration Definition,Acceleration is defined as the change in velocity divided by the time interval.,Acceleration Units,Speed/timem/s/s = m/s2 mi/hr/s = mi/hr-s km/hr/s = km/hr-sDistance/time/time or distance/time2,Ninja,Ninja 0 to 60 mi/h in 3.8
4、 sa = (60mi/h 0)/3.8sa = 15.8 mi/h/s 23 ft/s/s or 7 m/s/s,Concept Test 1,1. A particular car can go from rest to 90 km/h in 10 s. What is its acceleration?,Concept Test 1,A particular car can go from rest to 90 km/h in 10 s. What is its acceleration?(90 km/h 0)/10 s = 9 km/h/s,Concept Test 2,2. In 2
5、.5 s a car increases its speed from 60 km/h to 65 km/h while a bicycle goes from rest to 5 km/h. Which undergoes the greater acceleration? What is the acceleration of each vehicle?,Concept Test 2,2. In 2.5 s a car increases its speed from 60 km/h to 65 km/h while a bicycle goes from rest to 5 km/h.
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