Thursday

December 18, 2014

December 18, 2014

Posted by **Aaron** on Saturday, February 11, 2012 at 9:59pm.

P = 3^i - 2^j - 4^k lb. and Q = 5^i + 7^j - 2^k lb. acting at the points

(7; 2; -2) ft. and (-3; -2; 5) ft., respectively.

What I did was this;

vector r1= (7,2,2) - (5,4,3) = 2i-2j-5k

vector r2= (3,2,5) - (5,4,3) = -8i-6j+2k

Vector M1= (2i-2j-5k) X P = -7i-7j+2k

Magnitude= 7.55 ft-lbs

Vector M2= (-8i-6j+2k) X Q = -2i-6j+85k

Magnitude= 86.23 ft-lbs

Moment about the given point = (7.55) + (86.23) = 93.78 ft-lbs

I'm unsure if this is right

No one has answered this question yet.

**Answer this Question**

**Related Questions**

Engineering - Calculate the moment about a point (5; 4; 3) ft. caused by the ...

Physics/ Engineering - Calculate the moment about a point (5; 4; 3) ft. caused ...

Physics - A 49-N force is applied perpendicular to the portion BC of the bent ...

engineering mechanics - An exercise bicycle's flywheel is 30cm in diameter and 2...

engineering mechanics - An exercise bicycle's flywheel is 30cm in diameter and 2...

Physics please check - A uniform solid disk with a mass of 32.3 kg and a radius ...

science - 1. The surface tension in a cup of water is caused by _____. (1 point)...

physics (work posted) - For a body to be in equilibrium under the combined ...

chemistry - i am supposed to explain the order of boiling points from ...

Physics - A cylinder having a mass of 3.5 kg can rotate about its central axis ...