Saturday

October 25, 2014

October 25, 2014

Posted by **Anonymous** on Saturday, February 23, 2008 at 6:10pm.

++++Textbook Answer for Question 15: 108.3 N

----

14) A crate is being dragged up a ramp by a 125 N force applies at an angle of 40 degrees to the ramp. Find the magnitude of the force in the direction of motion (Answer is 95.8 N).

-----

+++++Please provide a step by step solution to this problem (question 15)! I really don't know what I'm doing! I know the answer, but I don't know how to get that answer! Thank you.

- Math: Applications of Dot Product -
**Damon**, Saturday, February 23, 2008 at 6:45pm14)

F vector at 40 degrees to motion direction Call Unit vector up ramp parallel to ramp Au.

The component of F in the direction of Au is

F dot Au = |F| * 1 cos (40) = 125(.766) = 95.8 Newtons

15) The 125 N is at 20+40 = 60 degrees from horizonal, so at 30 degrees from vertical

125 cos 30 = 108.3 N

**Answer this Question**

**Related Questions**

Discrete Math: Applications of Dot Product - A 35-kg trunk is dragged 10m up a ...

Math: Dot Product - A box with a weight of 215 N rests on a ramp. There is a ...

Calculus - A box is dragged with a force of 115 N up a ramp a distance of 3 m. ...

calculus - A box is dragged with a force of 115 N up a ramp a distance of 3 m. ...

Physics - A man is dragging a trunk up the loading ramp of a mover's truck. The ...

Vectors - check calculation - A box is dragged with a force of 115 N up a ramp a...

physics - A skateboarder with mass ms = 42 kg is standing at the top of a ramp ...

physics mechanical energy - A skateboarder with mass ms = 42 kg is standing at ...

Physics - The drawing shows a plane diving towards the ground and then climbing ...

Physics - A 115.0 kg box is pushed by a horizontal force F at constant speed up ...