Circular Motion Centripetal Force and Centripetal Acceleration.

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Presentation transcript:

Circular Motion Centripetal Force and Centripetal Acceleration

Velocity = distance / time

Speed = distance / time = 2(3.14)(10.6)/17.3s = m/s Speed = distance / time = 2(3.14)(0.3095)/.285s = 6.82 m/s

Gas pedal, brake pedal, and steering wheel

A a v v

Gravity Tension Normal Gravity Friction Friction + Normal Friction Gravity + Normal Normal - Gravity Normal

F grav F norm F grav F norm F net = F norm - F grav F net = F norm + F grav

Up Down >< Bottom The seat pushes upward on you more than you are use to!!! FALSE

Centripetal Acceleration

20N 11.25down 22.5 down 2.5 N a = v 2 /R a = 3 2 /0.8 F net = ma F net = 2x N 45UP 90 UP 110 N a = v 2 /R a = 3 2 /0.8 F net = ma F net = 3x11.25

5,000 N 16down 8,000down 3,000 N a = v 2 /R a = 8 2 /4 F net = ma F net = 500x16 5,000 N 28.8UP 14,400 UP 19,400 N a = v 2 /R a = 24 2 /20 F net = ma F net = 500x28.8

655 N 8.9down 5,345 down 6,000 N a = v 2 /R a = 14 2 /22 F net = ma F net = 600 x 8.9 6,000 N 31 UP 18,600 UP 24,600 N a = v 2 /R a = 30 2 /29 F net = ma F net = 600 x 31

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