Use the conservation of momentum to answer the following question. A 32-kg girl and a 36-kg boy face each other on friction-free roller blades. The girl pushes the boy, who moves away at a speed of 1.5 m/s. The girl's speed is ___ m/s.
Added by Alexa
Step 1
It states that the total momentum of an isolated system remains constant if no external forces act on it. In this case, before the girl pushes the boy, both of them are stationary. So, the total momentum of the system is 0. After the push, the boy moves with a Show more…
Show all steps
Your feedback will help us improve your experience
James Kiss and 60 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Use the conservation of momentum to answer the following question. A 47-kg girl and a 39-kg boy face each other on friction-free roller blades. The girl pushes the boy, who moves away at a speed of 0.2 m/s. The girl's speed is ___ m/s.
Nishant K.
A 51 kg boy on roller skates moves with a speed of 3 m/s. He runs into a 42 kg girl on skates. Assuming they cling together after the collision, what is their speed (in m/s)? (Assume the girl is initially at rest.) m/s
Sri K.
A 70.9-kg boy and a 43.2-kg girl, both wearing skates, face each other at rest on a skating rink. The boy pushes the girl, sending her eastward with a speed of 4.64 m/s. Neglecting friction, determine the subsequent velocity of the boy.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD