Tuesday

October 21, 2014

October 21, 2014

Posted by **Em** on Wednesday, May 25, 2011 at 7:06pm.

The answer is 85.38 foot-pounds.

I just need to figure out how to get the answer.

- Pre Calc -
**Damon**, Wednesday, May 25, 2011 at 7:32pmFind the angle of the Force F

cos T = 2/sqrt13 = .555

T = 56.3 deg above x axis

or

tan T = 2/3

so T = 56.3

Find the direction of motion from slope of line

tan slope = 1/2

slope angle = 26.6 deg

angle between force and motion = 56.3-26.6 = 29.7 degrees

so

component of force in direction of motion = 30 cos 29.7

= 26.06 pounds

26.06*3 = 78.2 ft lbs

beats me how to get 85.38

It would be much closer if the force vector were direction(3,2)

- Pre Calc -
**Megha**, Wednesday, January 30, 2013 at 9:11pmthe vector is actually <2,2>

and the line angle is 64.3

**Answer this Question**

**Related Questions**

Pre Calc - Find the work done by a force F of 30 pounds acting in the direction...

physics - A)An object at rest has no forces acting on it. B)An object can be ...

physics - An object acted on by three forces moves with constant velocity. One ...

physics - An object acted on by three forces moves with constant velocity. One ...

pre-calculas - An object is situated so that its center of mass is located at ...

Physics - What is an equilibrant? (Points : 1) an object that has zero net force...

Pre calc - Thanks in advance, these problems have been stumping me. Please ...

Pre-calc - Thanks in advance, these problems have been stumping me. Please ...

Physics - An object acted on by three forces moves with constant velocity. One ...

college physics - An object acted on by three forces moves with constant ...