Recent content by 1831

I got it...nevermind

Nevermind, I got it right...finally

[SOLVED] Spring System 1. Homework Statement You have been asked to design a "ballistic spring system" to measure the speed of bullets. A spring whose spring constant is k is suspended from the ceiling. A block of mass M hangs from the spring. A bullet of mass m is fired vertically upward...

Homework Statement You have been asked to design a "ballistic spring system" to measure the speed of bullets. A spring whose spring constant is k is suspended from the ceiling. A block of mass M hangs from the spring. A bullet of mass m is fired vertically upward into the bottom of the...

ok, i figured it out...thanks guys!

So for the perfectly Inelastic equation for max compression I got: m=mass of ball M=mass of block vi=initial v of ball vf=final v of ball+block .5*m*vi^2 = .5*(m+M)*vf^2 + .5*k*x^2 Evaluated: .5(.25)(5.9^2) = (.5)(.25+1)(1.2^2) + (.5)(29)(x^2) x=.48m...but this is incorrect, so i didn't try...

For the inelastic equation, the mass on the final side is mball+mblock as is the velocity final. (1.2 m/s) And for the elastic equation, the final velocity of the ball (3.5) and the vf of the block should be .4m/s...right?

Ok, I will place it in the HW section last time...I really thought I did. I'm sorry. I do know the difference between inelastic and elastic. For the inelastic collision, the ball sticks and moves with the block and spring. I used Vf= (m1v1i + m2v2i)/(m1+m2) =1.2 m/s to find the velocity of the...

[SOLVED] Elastic and Inelastic A 100 g block on a frictionless table is firmly attached to one end of a spring with k = 29 N/m. The other end of the spring is anchored to the wall. A 25 g ball is thrown horizontally toward the block with a speed of 5.9 m/s. Q1: If the collision is perfectly...

I don't get any other answer but -.14 for V1f, can you tell/show me where I went wrong...I don't see how you can get a slightly different answer.

ok...so I've made a little progress, I think. I am using conservation of momentum and conservation of energy. m1=.1kg m2=.3kg v0=1m/s for both carts solving for v1f and v2f using conservation of energy: (1/2)m1v1^2 + (1/2)m2v2^2 = (1/2)(m1+m2)(v0)^2 +(1/2)(K)(x)^2 ... (where K is...

So I guess I should use conservation of momentum, with an initial velocity of 0? I'm a little confused if I don't need to find the acceleration...

Two air-track carts, one on the left with mass 100g and one on the left with mass 300g) are sliding to the right at 1.0 m/s. There is a spring between them that has a spring constant of 100N/m and is compressed 4.2 cm. There is a string that holds the two carts together. The carts slide past a...