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Circular Motion and Orbits

Circular Motion and Orbits. Lesson 1: How Can You Move In A Circle?. Dodgems. What forces act on Dodgems? What causes them to stop, speed up, slow down, change direction?. Dodgem Card Sort. Divide the forces in your card sort into three categories Forces which speed you up

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Circular Motion and Orbits

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  1. Circular Motion and Orbits Lesson 1: How Can You Move In A Circle?

  2. Dodgems • What forces act on Dodgems? • What causes them to stop, speed up, slow down, change direction?

  3. Dodgem Card Sort • Divide the forces in your card sort into three categories • Forces which speed you up • Forces which slow you down • Forces which change direction of motion

  4. Today’s Lesson • How can you move in a circle? • What do you expect to know by the end of the lesson?

  5. Circular Motion – developing ideas • An object moving in a circle changes direction all the time • When an object changes direction, it is due to a resultant force (Newton’s 2nd Law) • This force acts towards the centre of the circle • The force has a special name centripetal force • The object is said to accelerate towards the centre of the circle (centripetal acceleration)

  6. Rubber bung Plastic tube eye Marker Masses The Rubber Bung Experiment SAFETY Wear Eye Protection • See worksheet

  7. What have you learnt? • Arrange the following into six sentences about circular motion This force is called a Circular Motion requires a As the radius of orbit increases, Centripetal Force. In our experiment, the tension in the string the centripetal force Increases. provides the centripetal force needed. Increases. As the speed of orbit increases, As the mass of the orbiting object increases, force acting inwards towards the centre of the circle. Decreases. the centripetal force the centripetal force

  8. Homework • Present your data in a table • Present your data on a graph • You will assess each other for • Accuracy • Reliability • Quality of table • Quality of graph

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