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.
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.
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.
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.
using google translator maybe can solve.
QUOTE (qnewera+Mar 17 2012, 10:08 AM)
using google translator maybe can solve. "in Excel at least the sin and Cos had to be in radians not degrees
=COS(30*PI()/180) was how to convert it."
Means: when you use Microsoft Excel, as your calculator, when you need to enter sine or Cosine values they have to be in radians rather than degrees.
Excel Help files told me how to convert degrees to radians and that was the formula you use in Excel that converts 30 degrees to radians.
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