Recent content by zn23

m1u1^2= m1 [(m1u1- m2V2 )/m1]^2 + m2V2^2 m12u1^2= [(m1u1- m2V2 )]^2 + m2 m1V2^2 m12u1^2= (m1u1)^2 - 2(m1u1 m2V2) + ( m2V2 )^2 + m2 m1V2^2 Assuming that I have to solve for V2 in order to apply that into 1/2mv^2, however once I get to the third line I have difficulties solely isolating V2...

Thanks for the feedback, but could you perhaps elaborate a little bit more on the response and to the first question, and what do you mean by "momentum conservation?" I thought the equation I initially used was Momentum Conservation?:confused:

The first Question A 2.5 kg ball and a 5.0 kg ball have an elastic collision. The 2.5 kg ball was at rest and the other ball had a speed of 3.5 m/s. What is the kinetic energy of the 2.5 kg ball after the collision? Homework Equations J=p (Impulse = momentum) (F)t= m2v2f+m1v1i...

^^^^^ could u perhaps clarify that?

Tough Concept Question! Homework Statement A rifle is used to shoot twice at a target using identical cartridges. The first time, it is aimed parallel to the ground and directly at the center of the bull's eye. The bullet strikes the target at a distance of HA below the center, however. The...

Homework Statement Useful background for this problem can be found in Multiple-Concept Example 2. On a spacecraft two engines fire for a time of 871 s. One gives the craft an acceleration in the x direction of ax = 6.00 m/s2, while the other produces an acceleration in the y direction of...

what wud u suggest another way to find time wud be ?

Homework Statement Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The stones are thrown with the same speed. The height of the cliff is 4 m and the speed with which the stones are thrown is 7 m/s...

lol yur a genius I am an idiot^^, the answer was -269 for x and for y it was +186.59, i tried typing it in and it was correct thanks a lot man:)

im positive^^^

I cannot figure this out at all, its a question on the computer so when i type in -270, it tells me, please put the correct number of significant figures and i can't display it -2.70 x 10 ^ 2, because it doesn't allow scientic notation...

i believe its 2, becuz if u were to put it into scientific notation it wud 27 x 10 ^ 1 or 2.7 X 10 ^ 2. A Trailing 0 is only significant if its after a decimal point, 27.0 wud be 3, but that's not the answer

^^ yea if the answer was 270 and i add (-270) that will become 0, only problem is i have to display the answer in 3 significant digits, and -270 is only 2 significant digits...

? come again? lol sorry i misunderstand

^^^ i actually have done, although i didnt display it, for total x value : A + B - C , C is the only one in the west direction therefore I had to subtract it (151.30) + (191.48)- (72.62) = 270. 15 i did the same for y but its the wrong answer...