Physics

Two balls are approaching each other head on. Their velocities are + 9.55 and -11.0 m/s
(a) Determine the velocity of the center of mass of the two balls if they have the same mass.
(b) Determine the velocity of the center of mass of the two balls if the mass of one ball(v=9.55m/s) is twice the mass of the other ball (v=11.0m/s)

(a) mv1 + mv2 = 2m V
where v is the center-of-mass velocity
V = (v1 + v2)/2 = -1.45/2 = -0.725 m/s
(b)2mv1 + v2 = 3m V
solve for V

  1. 👍
  2. 👎
  3. 👁
  1. The second equation of part be should be 2mv1 + mv2=3mV. 2m(9.55)+(-11m)=3mV which is equal to 19.1m-11m=3mV which is equal to 8.1m=3mV now divide both sides by 3m (where the m's cancel out)and you get V= 2.7 m/s

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Pre Algebra Probability

    Each of two urns contains green balls and red balls. urn 1 contains 10 green balls and 14 red balls. urn 2 contains 4 green balls and 11 red balls. if a ball is drawn from each urn what is p(red and red)? BTW- i really don't know

  2. maths

    a box contains 5 red balls and 6 black balls in how many ways can 6 balls be selected so that there are atleast two balls of the same colour

  3. College Math

    Four balls are selected at random without replacement from an urn containing four white balls and five blue balls. Find the probability of the given event. ‚Äč All of the balls are blue.

  4. geometry

    Four metal balls fit snugly inside a cylindrical can. A geometry student claims that two extra balls of the same size can be put into the can, provided all six balls can be melted down and the molten liquid poured into the can. Is

  1. math

    a box contains 5 red balls,7 green balls ,and 6 yellow ball.In how many ways can 6 balls be choosen if there should be 2 balls of each color

  2. Probability again

    A box contains 6 red balls, 4 blue balls, and 2 green balls. Three balls are randomly drawn (without replacement) from the box. What is the probability that the three balls selected are all the same color?

  3. Math

    A bag contains three black balls, four white balls and five red balls. Three balls are removed without replacement. What is the probability of obtaining a one of each colour b at least two red balls ?

  4. English

    Read the following lines from Marge Piercy's "To Be of Use" The people I love the best Jump into work head first without dallying in the shadows and swim off with sure strokes almost out of sight. They seem to become natives of

  1. probability

    there are 4 white balls and 6 red balls in a sack. If two balls are taken out successively ( the first ball is not replaced ) what is the probability that the balls are drawn are of different colors?

  2. English

    1. What is the name for the head of an orphanage? 2. What is the name for the head of an nursery school? 3. What is the name for the head of a day-care center? 4. What is the name for the head of a senior center? 5. What is the

  3. physics

    A 2.20-kg ball, moving to the right at a velocity of +1.27 m/s on a frictionless table, collides head-on with a stationary 7.20-kg ball. Find the final velocities of (a) the 2.20-kg ball and of (b) the 7.20-kg ball if the

  4. physics

    A 100g golf ball moving with a velocity of 20 m/s, collides with an 8 kg steel ball at rest,if the collision is elastic,compute the velocities of both balls after the collision.

You can view more similar questions or ask a new question.