Can anyone help me figure out this question? I swear this isnt homework! Im actually from a car forum and would like to understand some basic principles behind car engine pulleys.(adsbygoogle = window.adsbygoogle || []).push({});

Pulley A drives another pulley Bx via a belt.

Pulley A

diameter:15inches

weight: 1lbs

applied torque: 10lbs*1inch

Pulley B1

diameter: 5inches

weight: 0.5lbs

Pulley B2

diameter: 5inches

weight: .75lbs

Pulley B3

diameter: 7inches

weight: .25lbs

Pulley B4

diameter: 7inches

weight: .75lbs

Which of the Bx pulleys will require more torque from Pulley A to rotate? How do you figure this out? What is the resulting torque on each of the Bx pulleys?

thanks a lot!

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Help! Basic Rotational Dynamics Question

**Physics Forums | Science Articles, Homework Help, Discussion**