Get the SoR Robotics Android App on Android Market for FREE. See this forum post for details.

0 Members and 1 Guest are viewing this topic.

I know moments equal F*D, but here I am only give the magnitude of force along with the angle at which the force is acting upon the moment arm. How would I go about solving this? Trigonometry?

Yes, you just need to calculate how much the 5N is reduced due to the angle being 25° from the optimal 90°.

Hint 1: Use trig to find the force that is perpendicular to the moment arm.

Surprisingly everyone else trying to help didn't look closely.

Hi,Quote from: Gertlex on December 02, 2011, 02:50:54 PMSurprisingly everyone else trying to help didn't look closely.??Did you see anyone (except OP) mentioning anything about calculating moment here?

ps - I did say 'make sure you calculate in degrees, not radians'. It's a very common mistake

What is the other force, the one that's pulling the bolt and not contributing to the rotation?

QuoteWhat is the other force, the one that's pulling the bolt and not contributing to the rotation?Would it be gravity?

Quote from: Mastermime on December 03, 2011, 10:12:49 PMQuoteWhat is the other force, the one that's pulling the bolt and not contributing to the rotation?Would it be gravity?Have a look again at the picture. You have 5N pulling at the wrench at an angle. What you calculated above was the component of the 5N force pulling perpendicular to the wrench (creating a moment). But what is the component of the 5N force pulling parallel to the wrench?This is called 'breaking a force into component X Y Z forces'. You calculated the X force already, so what is the Y force?