Question

3. Two identical balls leave from the same height at position 1 & 2 with the same speed but at different angles. When two balls come back to the same height again (at position 3), what is NOT the same for both balls? A. Acceleration B. Potential energy C. Kinetic energy D. Momentum 1 2 3 4. Two balls of equal mass are thrown horizontally with the same initial velocity. They hit identical stationary boxes resting on a frictionless horizontal surface. The ball hitting box 1 bounces back while the ball hitting box 2 gets stuck. Which box ends up moving faster? A. Box 1. B. Box 2. C. They move at the same speed D. Cannot tell. 2

Answer 1

1 100 Page STUDET RETT OOR are We know that it bay thrown with same initial velocity than same height their potential is same energy Using energy conservation IF is potential same at energy point 3 than their Kinetic is energy also because their total enerergy is equal initially same Acceleration is g everg wherein OF relocities but their momentum is not same at point 3 because direction OF both balls are different at point 3 so their momentum is also diresent Hences Answer is option B.(momentum) using momentum conservation Pi = Pf (Pray, f) + Pblocks Poloset Pray - box, y) g 2 P = Pf Phay = (Pray, f? + Polockz 4. Pbay Pblock - Thay Praust) 2 =-ve (Phay, f), (Pbau, f)2 = tre hence, Polock > Pelove 2 Answer is A ( Box1