Saturday

January 31, 2015

January 31, 2015

Posted by **mightymouse** on Sunday, March 22, 2009 at 9:03pm.

ë = 50.0 g/m + 21.0x g/m2

(a) What is its mass?

(b) How far from the x = 0 end is its center of mass?

I think you would plug in the 39cm for the x in the equation, but change it to meters first of course. The problem is how do you just get it in grams then because the units you get are g/m. I'm not sure how to even start with the center of mass.

- physics -
**Count Iblis**, Sunday, March 22, 2009 at 9:32pmYou need to compute the integral of the linear density from x = 0 to x = 39 cm to obtain the mass.

The center of mass is the integral of the linear density times x from x = 0 to x = 39 cm, divided by the mass.

**Answer this Question**

**Related Questions**

physics - A rod of length 30.0 cm has linear density (mass-per-length) given by ...

physics - A rod of length 30.0 cm has linear density(mass-per-length) given by [...

physics - A steel rod of length 4 m is welded to the end of an aluminum rod of ...

Physics - The density of a 5.0-m long rod can be described by the linear density...

physics - A thin rod of mass M and length L is lying on a frictionless table. It...

Physics - There is a horizontal rod of length L and mass M. A point mass m is ...

Physics - The density of a 4.41-m long rod can be described by the linear ...

Physics - The density of a 4.41-m long rod can be described by the linear ...

physics - A thin non-uniform rod of length L=2.00 m and mass M=9.00 kg is free ...

Physics - The length of the rod will become exactly half of its original value. ...