A community for students.
Here's the question you clicked on:
 0 viewing
thtshortchick
 3 years ago
Ball 1, with a mass of 20kg is moving to the right at 20 m/s. At what velocity should ball 2, with a mass of 40kg, move so that they both come to a standstill upon collision?
thtshortchick
 3 years ago
Ball 1, with a mass of 20kg is moving to the right at 20 m/s. At what velocity should ball 2, with a mass of 40kg, move so that they both come to a standstill upon collision?

This Question is Closed

Rogue
 3 years ago
Best ResponseYou've already chosen the best response.1This question really belongs in the physics group, but here is how you do it... The balls will come to a standstill upon collision if they have the same momentum (going in opposite directions, so they cancel out). Momentum is given by the equation...\[P = mv\]Where P is momentum, m is mass, v is velocity. For your questions, since the momentum of ball 1 and ball 2 must have the same magnitude, you can set their momenta equal to each other.\[P_1 = P_2\]\[m_1 v_1 = m_2 v_2\]Substitute what you have and solve.\[20 kg * 20 m/s = 40 kg * v_2\]\[v_2 = \frac {400 kg*m/s}{40 kg} = 10 m/s\]So ball 2 should move at 10 m/s.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.