Object A has mass mA=10 kg and initial momentum <20,-5,0>kg.m/s, just before it

Question

Object A has mass mA=10 kg and initial momentum <20,-5,0>kg.m/s, just before it strikes object B, which has a mass =13 kg.Just before the collision object B has initial momentum <3,6,0>kg.m/s. Just before the collision, object A is observed to have a momentum=<16,4,0> kg.m/s. (a) What is the momentum of object B just before the collision ? (b)Before the collision, what was the magnitude of the momentum of object B ? (c)Before the collision what was the kinetic energy of object B?

Explanation / Answer

impulse=change in momentum=(3i+6j-20i+5j)=-17 i+11 j magnitude=v172+112 =20.25 a)momentum of B=3i+6j magnitude=6.7 c)v=6.7/13=0.515 k.e=1/2mv^2=13*0.515^2 /2=1.72 J

Related Questions

Navigate

• Browse (All)
• Browse O
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.