I am still doing my lab and now im stuck on this collision. Can anyone tell me if i did this right.(adsbygoogle = window.adsbygoogle || []).push({});

*U=initial velocity and V=final velocity

Mass 1 = Mass 2 = 0.541 kg

U(1)= 0.29 m/s [40 N of E]

U(2)= 0.29 m/s [35 N of W]

V(1) =0.26 m/s [36 N of W]

V(2) = 0.26 m/s [30 N of E]

Oh these values were measured they werent given to me.

Ok here are my calculations.

Ekbefore=Ekafter

1/2m(1)U(1)^2 + 1/2m(2)U(2)^2 = 1/2m(1)V(1)^2 + 1/2m(2)V(1)^2

0.29^2 + 0.29^2 = 0.26^2 + 0.26^2

0.1682=0.1352

How would you find the percentage of error and what percentage would be reason to be off by.

Pbefore=Pafter

m(1)U(1) + m(2)U(2) = m(1)V(1) + m(2)V(2)

0.29[40 N of E] + 0.29[35 N of W] = 0.26[36 N of W] + 0.26[30 N of E]

X component of Pbefore.

0.29cos40 - 0.29cos35 = -0.0154

Y-component

0.29sin40 + 0.29sin35 = 0.353

Pbefore = square root (0.353^2 + 0.0154^2) = 0.353

Pafter x = -0.26cos36 + 0.26cos30 = 0.0148

Pafter y = 0.26sin36 + 0.26sin30 = 0.253

Pafter = square root (0.253^2 + 0.0148^2) = 0.253

Is that all right or am i doing something wrong.

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# Homework Help: I'm soo confused

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