Question

7. A hockey puck B at rest on a smooth ice surface is struck by puck A of the same mass. Puck A was originally traveling at 30 m/s along the x-axis and is deflected 30 degrees from its original direction after an elastic collision. Use the principle of conservation of momentum and energy to, (a) compute the speed of each puck after the elastic collision, and (b) find the angle of puck B makes with the x-axis after the collision. Important hints: In order to avoid frustration with the many equations, the first step is to use your math skill to eliminate from the momentum equations. Then examine the energy equation, which has v2 and v. but no 0. Comparing the two, you can solve for v, or Vg, and part (b) follows.

Answer 1

Elastic collision in two dimension & special cases & when mass of two objects are equcel and one of them is initially aut peste to coatso ccelled scatteding) elastic out conseovcetion of kl Ekti sket mu2 = x Celestic collision). at 2 + 1 u2² 22 = 4,2+ Ug² 0. conservation of momentum. component foom is more convenient if objects do not stick ; (E podi (EPO) f myto= miei cordi + mv2 Coso. 17 un coser & ue COSG2 vector form is more convenient if objects stick.

Date I I (EPU 0 = ("Pode maursino, a ono ue sino2 ) ei sin om 02. Sin O2 10= Uisin or vasinon cej 2 + (3)? S - 42 = clicosor o coso alt 42= wer Uge & Qu1u2 wisina - ussing con coit 02) Now use ①, 42 42+ 4e². 42 42 & Quluz cor con+02) 20102 cos Col402) = 0 Ot 02 = II Trop. condusion a when collision aroe equal and Best then after is clastic, masses. one of them it collision masses و خا نه وبلله (Non accativistic case).

Now put Us=ismis in ean , ".00 = 36it 15 45=Boi Ui= 25.98 mis