Question

To balance a 40.8-kg automobile tire and wheel, a mechanic must place a 41.7-g lead weight 25.0 cm from the center of the wheel. When the wheel is balanced, its center of mass is exactly at the center of the wheel. How far from the center of the wheel was its center of mass before the lead weight was added?

Answer 1

Call the unknown distance x.

x*40.8 kg = 0.00417 kg*25 cm

Solve for x in units of centimeters

Answer 2

**41.7g = 0.0417kg

not, 0.00417 =)