Your assumption is correct. If you simply choose initial to be "before the collision,"
a)
P(iA) = 0.202 * 2
P(iB) = 0
b)
KE(iA) = .5 * .202 * (2)^2
KE(iB) = 0
A ball A of mass .202 kg is moving at a velocity of 2.0 m/s toward a ball B that is at rest.
(a) Calculate the initial momentum for Ball A and Ball B.
(b) Calculate initial Kinetic energy for Ball A and Ball B.
My doubt since its asking for initial moment only, can I simply calculate each separately? The collision hasn't occurred yet.
1 answer