Middle School

Three kids are riding on a snow sled traveling horizontally without friction at [tex]19.8 \, \text{m/s}[/tex]. The masses of Kid A, B, and C are [tex]42.8 \, \text{kg}[/tex], [tex]31.5 \, \text{kg}[/tex], and [tex]25.9 \, \text{kg}[/tex], respectively.

What is the new velocity of the sled if Kid A jumps off vertically from the sled? (Kid A's velocity is [tex]0 \, \text{m/s}[/tex] vertically)

Answer :

Explanation:

Momentum is conserved:

m₁v₁ = m₂v₂

(42.8 kg + 31.5 kg + 25.9 kg) (19.8 m/s) = (31.5 kg + 25.9 kg) v

v = 34.6 m/s

Other Questions