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Presentation transcript:

See Top Gear cars on ice rink Circular motion See Top Gear cars on ice rink ‘Winter Olympics’

For anything to go in a circle there has to be a force. P3 1.5 Circular motion For anything to go in a circle there has to be a force. Otherwise they would… ….. continue in a straight line out of the solar system

P3 1.5 Circular motion To travel in a circle at constant speed, the * velocity changes direction towards the centre VA A

P3 1.5 Circular motion To travel in a circle at constant speed, the * velocity changes direction towards the centre VA A VB B

P3 1.5 Circular motion To travel in a circle at constant speed, the * velocity changes direction towards the centre * object accelerates continuously towards the centre VA VB A B

P3 1.5 Circular motion To travel in a circle at constant speed, the * velocity changes direction towards the centre * object accelerates continuously towards the centre VA VB A B Acceln = change in velocity time taken

P3 1.5 Circular motion To travel in a circle at constant speed, the * velocity changes direction towards the centre * object accelerates continuously towards the centre * centripetal force causes the central acceleration VA VB A B Acceln = change in velocity time taken

P3 1.5 Circular motion To travel in a circle at constant speed, the * velocity changes direction towards the centre * object accelerates continuously towards the centre * centripetal force causes the central acceleration VA VB A B Acceln = change in velocity time taken Force = mass x acceln

P3 1.5 Circular motion To travel in a circle at constant speed, the * velocity changes direction towards the centre * object accelerates continuously towards the centre * centripetal force causes the central acceleration VA VB A B Acceln = change in velocity time taken Force = mass x acceln

To travel in a circle at constant speed, the Circular motion To travel in a circle at constant speed, the * velocity changes direction towards the centre * object accelerates continuously towards the centre * centripetal force causes the central acceleration VA VB A B VB - VA Acceln = change in velocity time taken VB - VA Acceln = T Force = mass x acceln Mathematically it can be shown that acceln = V2 r Force = mass x V2 r

P3 1.5 Circular motion Force = mass x V2 r The Centripetal force needed increases if : the mass increases the speed increases the radius of the circle decreases

P3 1.5 Circular motion

P3 1.5 Circular motion

P3 1.5 Circular motion