thanks, i do know what both of those rules are, he just didnt explain it in class yet, guess I was supposed to have picked that up in my book in a chapter we havent done yet.
hmmmm....i cant find the rule but the example in my book shows a bowling ball spinning from what we will call west to east and the angular momentum is directed upward, and if it was spinning opposite this it would be spinning downward. From this i could say that the answer would be the north...
Homework Statement
The earth's angular momentum is directed toward which celestial pole(north or south)?
Homework Equations
none
The Attempt at a Solution
I just assume that it is the south celestial pole considering that the earth is spinning from left to right, or west to east...
15 is the total height being walked up .15m per step * 100 steps = 15
her mass is 54kg and acceleration is 9.8m/s^2.
the total energy or work it takes to get to the top is Fd.
do you have a different way to determine the total distance?
Homework Statement
Energy is conventionally measured in Calories as well as in joules. One Calorie in nutrition is one kilocalorie, defined as 1 kcal = 4186 J. Metabolizing 1 g of fat can release 9.00 kcal. A student decides to try to lose weight by exercising. She plans to run up and down...
Excellent point about b) i cant believe that i missed that one thank you very much. But you are saying that there is no explanation for a being wrong. and the .003 off shouldn't matter because as long as you are within 1% or the correct answer it will give it to me.
EDIT: Your help has been...
1. Homework Statement
In the figure below, the man and the platform together weigh 780 N. The pulley can be modeled as frictionless. Determine how hard the man has to pull on the rope to lift himself steadily upward above the ground.
____________N
2. Homework Equations...
1. Homework Statement
The average speed of a nitrogen molecule in air is about 670 m/s, and its mass is about (4.68 x 10^-26)kg.
(a) If it takes (3.60 x 10^-13)s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in an opposite direction (assumed to be the...
I have to figure this out by tomorrow and i cant really figure out how to do it from looking up up anywhere. Can someone please resolve this one before it is due tomorrow?
no thats what im basically asking, we were not taught this but need to know it i guess to do this problem. Also it is not anywhere in the chapter's we are studying
Homework Statement
A vector is given by R(vector) = 1.90 ihat + 1.30 jhat + 2.92 khat.
Find the magnitude of the vector
Find the angle between the vector and the x, y, and z axis
Homework Equations
I have read something about dot product but im not sure if it applies here
The Attempt at...
ive looked at alot of stuff on the internet and no there were no notes in class and it is not described in this application in the book, but thanks for trying to help for now anyway, ill post later after my class to actually understand how this works