Question

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5. (pt) Shown below are three pairs of objects just before collision. All collisions are elastic. Case 1 Case 2 Case 3 3 m/s 1kg MPO PA 2kg 2kg | 3 m/s 3 m /s 1kg 1kg 1kg a) In which case will the 1 kg mass have the largest magnitude change in momentum? Case 1 Case 2 Case 3 All equal b) In which case has the 1 kg mass have the largest magnitude change in kinetic energy? Case 1 Case 2 Case 3 All equal c) In which case has the 2 kg mass have the largest magnitude change in momentum? Case 1 Case 2 Case 3 All equal

Answer 1

Soln 6) casel: Ting Bee 128g] Mizlig, mq = 2K9 , ,- 3 |1, V2 = 0 wenn man vist man y = -**3 = -1 7010. = m,- m2 vit 202 mit ma m m2 2m, vi mi-m2 vo mitm2 mitme - 2 ml. Carelll Tapil= m, (V-V,') = 144 = 4 16gmis. | AK,-1 m, (,21,2)=45- Topal= ma (V2 = V2') = 2x2 = 4 mls. I 4K7 = 142 (u) = 45 Carel m,=2kg, ma=1kg, V, = 3 m/8, V2 = 0 Vila Ž *3 = 1 ms, V'= 4 +354mls. lap,l = m. lv-vi) = 2x2= 1 kg mls. | Ak = 1x219-1)=85 14$21= my (V2-V>') = 1*4- Ukgmis. m ak2 = 1x1x16=85 " M=1kg, my alles, V, = 3 rols, V2 = 0 vi's0, V'= 2*3 = 3 mld. LAB, 1 = 143 = 3.19ml s. | 4k,= 4x1*9=4.55 1452) = 143= 319 mls. | 4K2 = 4.5J e st change in momentum: 1 (a) case I and case I have largest change in mor 116) In case II , 1kg mass has largest change in KE. te) In case I and case II, 2 kg has largest change in momentum