IB Physics · A.2 · structured
Two-fragment recoil 7
Space, time and motion · Momentum · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- demanding
- Marks
- 5
- Topics
- 2
- Answer
- Complete
Question5 marks
An object initially at rest separates into fragments A and B. Fragment A has mass 1.7 kg and velocity +5.1 m s⁻¹. Fragment B has mass 2.85 kg. Find B's velocity and explain the sign.
Task interpretation
What a complete response should do
Build a visible chain from the information given to the quantity or statement requested.
Split the problem into linked stages and state why each relationship applies.
- Response type
- structured
- Allocation
- 5 marks
- Demand
- demanding
Ready to check?Reveal answer and worked solution
Private on this device
How did this one feel?
Use your answer and the marking steps—not confidence alone—to choose.