Question

Physlcs 2018-2019 CH 07 HW t Catching a Ball on Ice ol22 > Cun-lants Part A atadium parking lot in Euffale, New York there i throw Olaf ง bal ofmass 0.400 kg thti travc ing Fxpress your answar numerically in manars par second Vinw Availablie Hinns Pat B lt tha ball hhs Qat ane hource, ott ns chest hartantally at 1 dd m/s in tha āppasha dracion what ls h Lxpress your answer numerically In mesers per second. spaad i늘 atlar the collision? Figure 1 ef1 View Availlsble Hint m/s Next>

Answer 1

Using the law of cons. of momentum

initial = 0.4kg x 10.0m/s
final = (75 + 0.4)kg x V
► ............... V = 0.4 x 10.0 /75.4 = 0.0557 m/s


B) involves conservation taking account of directions (ans. No 1 hasn't ! )

initial = 0.4 x 10.0 = 4 kgm/s
final = (75kg x V→) + (0.4kg x 7←) = 75V - 2.8

now .. 4 = 75V - 2.8 .............► V = 6.8 /75 = 0.0906 m/s