Monday, January 23, 2012

Physics Answer Check Please?

A lily grows out of a pond straight and relative to the surface of the water and the bottom of the pond, the blossom is 10 cm above the water surface. As you pull the lily to the right, keeping the stem straight, the blossom touches the water surface 21 cm from the point where the stem broached the water when you had the lily in the vertical position. Based on this information, how deep is the water in the pond?



I set this up using the Pythagorean theorem making a the equation

21^2 + x^2 = (x+10)^2



factoring i got x^2 +20x +100 = 441 + x^2

the x squares cancel and i got the final step to be...

20x = 341

x=17.05 cm deep.



Can anyone verify this being the correct setup.

Physics Answer Check Please?
You are correct
Reply:Yup, looks correct to me.

get well flowers

No comments:

Post a Comment