A child on a sled reaches level ground at 6.2 m/s. As he passes by his dog, who

Question

A child on a sled reaches level ground at 6.2 m/s. As he passes by his dog, who is standing still, the dog jumps on, and the sled continues on. The child and the sled have a mass of 25 kg, and the dog has a mass of 15 kg. How fast does the combination move afterward? A child on a sled reaches level ground at 6.2 m/s. As he passes by his dog, who is standing still, the dog jumps on, and the sled continues on. The child and the sled have a mass of 25 kg, and the dog has a mass of 15 kg. How fast does the combination move afterward?

Explanation / Answer

Use conservation of momentum to solve this problem:

initial momentum = final momentum

=> (25*6.2) + (15* 0) = (25+15)v

=> v = 3.875 m/s

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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