# Centre of Gravity Help

1. Jan 27, 2013

### gazing600000

Hello I am stuck on this question here(in attachments )

How do you find the centre of gravity ????

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2. Jan 27, 2013

### Staff: Mentor

What do you think? What's the definition of center of mass?

3. Jan 27, 2013

### gazing600000

Well The centre of Gravity I believe is the point of which all of the weight of the object acts upon.

4. Jan 27, 2013

### Staff: Mentor

That's true. Another way to define it is as the average location of the mass in an object.

5. Jan 27, 2013

### gazing600000

Yes but how would you solve the question then

6. Jan 27, 2013

### Staff: Mentor

7. Jan 27, 2013

### gazing600000

Yes I did

But surely there is a less complicated way of working out the centre of mass on this question

8. Jan 27, 2013

### Staff: Mentor

9. Jan 27, 2013

### gazing600000

Find the centre of gravity or mass of these objects

10. Jan 27, 2013

### Staff: Mentor

Well, what do you think?

Start with the symmetric dumbbell. Where do you think the center of mass would be?

(The link I gave tells you how to calculate the center of mass.)