physics

Two pucks moving on a friction less air table are about to collide. The 1.5 kg puck is moving directly east at 2 m/s. the 4 kg puck is moving directly north at 1 m/s. What is the total kinetic energy of the two-puck system before the collision?
a) sqrt(13) J
b)5 J
c)7 J
d)10 J
e)11 J
I got b) as the answer by using KE=1/2 mv^2 of both of the pucks. Then I added the two numbers up and got b).


(1/2)[(1.5x4) + (4x1)] = 5
You got it!

  1. 👍 0
  2. 👎 0
  3. 👁 53
asked by me

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    An air hockey table works by pumping air through thousands of tiny holes in a table to support light pucks. this allows the pucks to move around on cushions of air with very little resistance. one of these pucks has a mass of 0.25

    asked by Liz on October 28, 2009
  2. conservation of momentum

    If you have two pucks elastically collide on an air table, and then analyze the momentum vector diagram of the situation, you encounter an increase in momentum. What are possible reasons as to why there was a gain of momentum.

    asked by Melanie on November 30, 2008
  3. Physics

    Two pucks collide on an air hockey table. Puck A has a mass of 16 g and is initially traveling in the +x direction at 6.2 m/s. Puck B has a mass of 64 g and is initially at rest. After the pucks collide, puck A moves away at an

    asked by Mehreen on February 25, 2011
  4. Pucks and Collision

    If an experiment is being conducted with two pucks on an air table, an elastic collision. Does the pressure of the hose connected to the pucks effect the results of momentum and kinetic energy loss? Please give me your opinion on

    asked by Mel on December 1, 2008
  5. physics

    Two pucks collide on an air hockey table. Puck A has a mass of 17.0 g and is initially traveling in the +x direction at 7.00 m/s. Puck B has a mass of 51.0 g and is initially at rest. After the pucks collide, puck A moves away at

    asked by Tsion on March 24, 2014
  6. Physics

    Two pucks collide on a level air-hockey table. Puck A has a mass of 0.0250 kg and is moving initially due eastward at a speed of 5.50m/s. Puck B has a mass of 0.0500kg and is initially at rest. Right after collision, puck A is

    asked by John on November 2, 2009
  7. physics

    Search: The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.029 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.049

    asked by Brett on April 20, 2011
  8. physics

    Search: The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.029 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.049

    asked by B on April 20, 2011
  9. physics

    Search: The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.029 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.049

    asked by B on April 20, 2011
  10. Science...Please help

    What is friction? Can you give me some examples? -THANK YOU FOR ALL YOUR HELP! friction: Ever have a pinwheel and move it through the wind? Friction makes the wheel turn. Ever on a bike an press the brake? Friction makes the wheel

    asked by Hillary on April 16, 2007

More Similar Questions