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A 2kg mass is suspended from one end of a 1m ruler and a 5kg mass is suspended from the other end. Calculate the centre of mass. x 20N50N 1m – x Do now:

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Presentation on theme: "A 2kg mass is suspended from one end of a 1m ruler and a 5kg mass is suspended from the other end. Calculate the centre of mass. x 20N50N 1m – x Do now:"— Presentation transcript:

1 A 2kg mass is suspended from one end of a 1m ruler and a 5kg mass is suspended from the other end. Calculate the centre of mass. x 20N50N 1m – x Do now: Rātapu, 24 Haratua 2015

2 From yesterday: A bullet of mass 30g is fired with a speed of 400ms -1 into a sandbag. The sandbag has a mass of 10kg and is suspended by two ropes so that it can swing. What is the maximum vertical height the sandbag rises as it recoils with the bullet lodged inside? Use g = 9.8ms -2

3 Board notes – calculating COM positon

4 Axe Throwing Board notes – COM motion

5 Activity – use a ruler

6

7

8 Finish Activity 7D

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