Unit 8 Uniform circular motion

Unit 8 Circular motion

Find the speed you need distance and time.  Speed=distance/time  v=2pir/t

Important question is it accelerating  before we answer it directly take a mental snap shot when it is farthest to the left. Draw a force diagram for the stopper at that instant.

centrifugal force is not a force it’s a feeling?

Any way to get the forces to balance?

Is it accelerating up and down (no it is moving horizontally.  So is it accelerating up and down? No

Draw shadow arrows both on the dot this time.

Discrepant event rubber stopper where to release so that a person can catch it.

Draw a motion map for an object moving in a circle.

Rules

Velocity arrows always point tangent to the circular path

Acceleration arrows point inward toward the center

Funbal always points inward toward the center

Greek waiters tray demo  White board 3 situations

Demo of people shoulder to shoulder going in a circle getting into angle of lean

Examples of where you have to lean to go in a circle?

What will influence the force needed to cause something to move in a circle?

Units that make up a newton. Kgm/s/s  Use the units to figure out what the equation would have to be

Look up in the google what the coefficient is.  The question is what to look up in the google.

Centripetal force is a nick name. 

F­unbal=Fnet=Fcent

 Go over Unit 8 Worksheet 1

Remember our bodies are not velocity meters but accelerometers

How do we know that the unbalanced force goes down because the acceleration is toward the center of the circle.