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Starter – what’s the lesson today?

Starter – what’s the lesson today?. circular. + R. circle. motion. + on. mosh. 15 November 2014. Circular Motion. Objectives Be able to describe the factors that affect an object’s motion in a circular path and give examples. Outcomes. All should

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Starter – what’s the lesson today?

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  1. Starter – what’s the lesson today? circular + R circle motion + on mosh

  2. 15 November 2014 Circular Motion Objectives Be able to describe the factors that affect an object’s motion in a circular path and give examples.

  3. Outcomes • All should • Give examples of things that follow a circular path and describe what forces are involved. • Most Should • Explain how an object can stay travelling in a circular path • Some Could • Come up with their own examples of things travelling in a circle and describe how changing some of the factors would change the motion.

  4. Whirling Water • http://www.teachersdomain.org/resources/phy03/sci/phys/mfw/roller/assets/phy03_vid_roller/phy03_vid_roller_56_mov.html/phy03_vid_roller_56.mov • Why doesn’t the water spill?

  5. Matching centripetal forces – write these down or come up with your own examples

  6. Period of circular motion

  7. Frequency number of rotations frequency = time taken time taken period = number of rotations 1 1 T = f = f T Frequency, f, is the number of rotations per second. i.e. Because and

  8. Circular MotionPractical Time • Put some goggles on. • Balance a coin on the end of a coat hanger. • Twirl. • The record is 5 coins for 5 spins! Can you equal this?

  9. Circular Motion - Tasks • 1 Draw the diagram and explain the method. • 2 Describe the forces involved. (What keeps the coin on the end of the coat hanger? • 3 Copy and CompleteWhen a body moves in a circle it continuously …………… towards the …………of the circle. • This acceleration changes the …………… of motion of the body, not its …………... • The resultant force causing this acceleration is called the centripetal……………... • The direction of the centripetal force is always towards the centre of the ………………. speedacceleratesdirection circlecentreforce • 4 (Extension) To increase the centripetal force of an object in circular motion you could increase the _____ or ______ or decrease the ______ , whilst keeping the other two variables the same.

  10. Wall of Death • http://www.youtube.com/watch?v=31MMw3Eazqw • Describe why the vehicles stay on the wall

  11. Plenary - Going Up • – describe the lesson; what we did and what you learnt, how you learnt it; to your partner in the time it takes for a lift to reach the top floor – 120seconds. • You may be asked to tell the rest of the class too.

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