yuna4034
Hi, I'm new here. Not sure if I'm posting on the right section.

I have a home test and can't get the cos part

I have an example that is already done but i don't know how they got the answer. Is in Spanish but I am going to try to translate it. :S lol

A box is move on a floor by applying a force of 20N, with an angle of 30 degrees. What is the Work made if the box got move at a distance of 100m?

F=20N
the angle is 30
d=100m

W=Fd cos 0 it has a line across the zero

=(20)(100)(cos30)

= 1732 J

I have an TI-84 and when I multiply the 20,100 and the cos 30, I end up with a 308.50

It's my first time working with cos so don't know if you add, sub or divide.
yuna4034
just in case i translated wrong, the box got move through a distance of 100m. You know like from point A to point B. lol I have spend almost an hour searching for an answer lol.
Robittybob1
QUOTE (yuna4034+Mar 8 2012, 03:33 AM)
Hi, I'm new here. Not sure if I'm posting on the right section.

I have a home test and can't get the cos part

I have an example that is already done but i don't know how they got the answer. Is in Spanish but I am going to try to translate it. :S lol

A box is move on a floor by applying a force of 20N, with an angle of 30 degrees. What is the Work made if the box got move at a distance of 100m?

F=20N
the angle is 30
d=100m

W=Fd cos 0 it has a line across the zero

=(20)(100)(cos30)

= 1732 J

I have an TI-84 and when I multiply the 20,100 and the cos 30, I end up with a 308.50

It's my first time working with cos so don't know if you add, sub or divide.

in Excel at least the sin and Cos had to be in radians not degrees
=COS(30*PI()/180) was how to convert it.