Recent content by Physicstcd14

Oh right okay. Thanks :smile:

The question I was given on my Linear Algebra home assignment is as follows Witch of the following formulas define scalar products on R^2? Explain your answer. (a) ((x_1,y_1),(x_2,y_2)) = x_1y_2 + x_2y_1 (b) ((x_1,y_1),(x_2,y_2)) = x_1x_2 + 7y_1y_2 (c) ((x_1,y_1),(x_2,y_2)) = x_1x_2 +...

Homework Statement How do you know if say [(x_1,y_1),(x_2,y_2)] = x_1x_2 + 7y_1y_2 ? or any other equation? Homework EquationsThe Attempt at a Solution

Yes that's correct I'm not counting air resistance!

Homework Statement A sled slides from a slope with inclination α. A man standing on the sled ‘weighs’ an object with mass m using a spring balance. What weight does the balance indicate? I seem to be making it too complex, could anyone help me out with it? Homework EquationsThe Attempt at a...