1. J

    Does momentum "get transferred" during collisions?

    Is it correct to talk about momentum being transferred between objects during collisions? Did classical physicists view it this way at all? I have heard the expression before and as a physics educator I want to make sure I am using the right language. By describing momentum this way it seems...
  2. A

    Momentum and elastic collisions

    A particle of mass m, travelling at a velocity u, makes a perfect elastic collision with a stationary particle. After the collision both particles are observed to be travelling in directions making angles of 30 degrees to the original path of the first particle. Use the laws of conservation of...
  3. W

    Momentum help

    So, this might be an easier problem, but here goes: A moving object has a kinetic energy of 148 J and a momentum of 32.2 kg·m/s. a) Find the speed of the object. b) Find the mass of the object. I know that KE = (1/2)mv^2, but even if i plugged in the numbers, i would end up with two...
  4. B

    Conservation of Energy and Momentum - inelastic collisions

    Here's the question I've been attempting to solve: A plate of mass M moves horizontally with initial speed v on a frictionless table. A mass, m, is dropped vertically onto it and soon comes to rest with respect to it. How much energy is required to bring the system back to speed v? Explain...
  5. D

    isoenergetic collisions

    some stars are observed to be reddish and others blue. Which stars have ahigher surface temperature?
  6. D

    isoenergetic collisions

    Is it possible to have acollision between bodies in which all the kinetic energy is lost? If so, give an example.
  7. S

    Momentum concervation and collisions

    Question: A car, mass m1 is moving to the right on a frictionless air track. It collides with a second car, mass m2, which is initially at rest. Which of the following statements are true? (If A and E are true, and the others are not, enter TFFFT). A) If car 1 is much lighter than car 2, and...
  8. Q


    There is no sub-forum for collisions, this was the only place I could post. So excuse if it's in the wrong sub-forum. Here's the question: A 220 kg bumper car (A) going north at 0.565 m/s hits another bumper car (B) and rebounds at 0.482 m/s [S]. Bumper car B was initially travelling south...
  9. C

    two dimensional collisions

    Please help A stationary billiard ball, with a mass of 0.17 kg is struck by an identical ball moving at 4.0 m/s. After the collision, the second ball moves 60 degrees to the left of its original direction. The stationary ball moves 30 degrees to the right of the moving ball's original...
  10. C

    Two dimensional collisions

    A 4 kg ball (A) is moving at speed of 3 m/s. It collides with stationary ball (B) of same mass. After the collision, ball A moves off in a direction of 50 degrees to the left of its original direction. Ball B moves off in a direction 90 degrees to the right of ball A's final direction. (1) what...
  11. C

    Collisions question- really urgent.

    Hi I am really stuck on the following and have an exam on it in 2 days. Can somebody please help me. A particle of mass m collides elastically at an angle of 90 degrees with a lighter particle of mass km. Initially both particles had a speed u. After the collision the particles move apart as...
  12. B

    work, energy, collisions

    A block of mass 2kg is placed on a rough horizontal floor, the coefficient of friction is O.4, a bullet of mass 10gm is fired with a velocity of 6.0 ms-1 into the block. Find the 1) The velocity with which the block and bullet being move together after the impact 2) the loss of K.E due to...
  13. S

    Help with collisions

    Three ice pucks are projected so they will all collide and stick together. M1 is 2kg and is initially moving at 8m/s at -30 degrees. M2 is 4kg and is initially moving at 10 m/s at 210 degrees. M3 is 6kg and is initially moving at 5 m/s at an unknown velocity. After they stick together, their...