Recent content by pewpew23

Okay, so I understand the GPE. But what about the Elastic Potential? How do I do that? Am I supposed to solve for X using mg=-kx?

Homework Statement A mass of 1.5 kg oscillates vertically at the end of a lightweight spring. The spring has a spring constant of 145 Newtons per meter. The amplitude of the motion is 8.00 cm. From this data, complete the table below. I have to find velocity, acceleration, elastic...

1/2m(32)^2 - 1/2(0)^2 = 512m 1/2m(64)^2 - 512m = 1536m 512m/1536 = 3 times as much

so going from 0 to 64 would require twice as much kinetic and chemical potential energy as going from 0 to 32? and going to 0 to 32 would require the same amount as going to 32 to 64?

Homework Statement The chemical potential energy in a certain amount of gasoline is converted to kinetic energy in a car that increased its speed from 0 mph to 32 mph. The car accelerated to 64 mph. Compared to the energy required to go from 0 to 32 mph, the energy required to go from 32 mph...

At the top of the ramp, all energy is in Gravitational Potential (mgh) and KE. and at the bottom there is only KE. 1/2vi^2 + gh = 1/2vf^2 12.499 = 1/2vf^2 and vf = 4.9

KE= 1/2mv^2 GPE= mgh and that would give us h= .81716 but how would I use that solve for vf is vi=3?

so a=(vf-vi)/t a=4/t a=(vf-3)/t set them equal to each other 4/t = vf-3/t t's cancel out and we get 4= vf-3 and vf=7 :)

I'm not sure I understand your equation... vf meaning velocity and ? vi is initial velocity, correct?

http://i10.tinypic.com/2a66pap.jpg It is similar to this, except with a block on one end and nothing on the other.

Homework Statement A box initially at rest at the top of a frictionless ramp is allowed to slide to the bottom. At the bottom its speed is 4 m/s. Next, the box is again slid down the ramp, but this time it does not start from rest. It has an initial speed of 3 m/s at the top. How fast is it...

ohhh... I had a feeling I had to include the full force of gravity in there. Thanks for your help! I have a couple more questions left... is there any chance you could help me with those as well? I completely understand if that is asking for too much :)

No, I don't have the correct answer.

Homework Statement A crate with a weight of W is being lifted with an upward acceleration equal to one-half the magnitude of acceleration due to gravity. The crate is being lifted by a rope that passes over a frictionless pulley connected at the ceiling as shown in the drawing. The mass of...