Recent content by PEToronto

  1. P

    SOLVED: Elastic Collision, Same Direction

    Thanks haruspex, That formula looks very useful, and I'll try deriving it when i finish my homework. V1f turned out to be -0.86 m/s. I'll rename this thread as 'solved'. Thanks again! PET
  2. P

    SOLVED: Elastic Collision, Same Direction

    By plugging V2f into the Kinetic Energy Equation and solving for V1f, I get +/- 0.859. -0.859 seems more reasonable. Did I mess up again?
  3. P

    SOLVED: Elastic Collision, Same Direction

    Homework Statement A 100g ball moving to the right at 4.1m/s catches up and collides with a 400g ball that is moving to the right at 1.0m/s . a)If the collision is perfectly elastic, what is the speed and direction of the 100g ball after the collision? b)If the collision is perfectly elastic...
  4. P

    Non-uniform circular motion problem

    I got the answer, so I'm going re-title the thread as "Solved:..." Thank you BvU and Newton!
  5. P

    Non-uniform circular motion problem

    Oops... Thank you so much! One oversight that gave me a week of stress!
  6. P

    What are the benefits of applying physics to society?

    Hello, I hope everyone's having a great day. I'm an engineering student from Toronto, and I hope to benefit from the knowledge and expertise on this forum, so I can one day apply physics to benefit society!
  7. P

    Non-uniform circular motion problem

    Homework Statement A 200g ball on a 55-cm-long string is swung in a vertical circle about a point 200 cm above the floor. The string suddenly breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height 600 cm above the floor. What was the tension in the...