Recent content by Jaklynn429

Here is my problem though...the statement doesn't separate those two things. The problem reads exactly this: "Fleas have remarkable jumping ability. If a 0.50 mg flea jumps straight up, it will each a height of 36 cm if there is no air resistance. In reality, air resistance limits the height to...

I'm sorry! The problem wants to know: a) what the flea's kinetic energy is as it leaves the ground? b) at its highest point, what fraction is converted to potential energy?

Homework Statement Fleas have remarkable jumping ability. If a 0.50 mg flea jumps straight up, it will reach a height of 36 cm if there is no air resistance. In reality, air resistance limits the height to 18 cm. Homework Equations K=1/2 m*v^2 The Attempt at a Solution I tried to...

I figured it out, converted to CM and got my final answer as 1.06 cm, and it was right! Thank you so much for all your help!

Tipping something given its center of mass? My LAST homework problem! Homework Statement A rectangular block of mass 3.0 kg is at rest on a table. Its height (in its current position) is 0.7 m, but because its composition varies vertically, its center of mass is at a height of 0.40 meters...

I got my final answer to be .0106. Is this in meters, then? Do I need to convert to centimeters?

Okay. So now i have y=200. yay! So now i need area A which is [im assuming?] l*w? So .76*.001=A?

Would the stress be 2200 then?

I understand that, but how is this going to help me in my problem? I'm sorry if I sound stupid...

Y is Young's Modulus, which in my notes is just referred to as a measure of the substances inherent stiffness, and i don't know where to get this...

Homework Statement A 76 cm long, 1.0 mm diameter steel guitar string must be tightened to a tension of 2200 N by turning the tuning screws. By how much is the string stretched? Homework Equations F=kx K=YA/L The Attempt at a Solution I don't know how to approach this problem...

I got the answer! thank you so much!

Homework Statement http://i241.photobucket.com/albums/ff4/alg5045/p13-17.gif The four masses shown in the figure below are connected by massless, rigid rods. (a) Find the coordinates of the center of mass if MA = 130 g and MB = MC = MD = 260 g. (b) Find the moment of inertia about an axis that...

I got the first part by using (4*.37) + (2.2*.74) = 3.108*9.8=30.46 Now I am having trouble with the second part, wouldn't I just use that answer times sin(35)? I get 17.468 and its telling me I am wrong.

Homework Statement An athlete at the gym holds a 2.2 kg steel ball in his hand. His arm is 74 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? 1) Parallel out to his side 2) Straight but 35 M below...