Physical Science

A boy throws a 4-kg pumpkin at 8 m/s to a 40-kg girl on roller skates, who catches it. At what speed does the girl then move backward?

  1. 👍 0
  2. 👎 0
  3. 👁 197
  1. you have to use conservation of momentum, and conservation of energy on this. Remember the boy moves after he throws it also.

  2. I don't understand how to work it?

    1. 👍 0
    2. 👎 0
  3. Is it .8 m/s

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. physical science

    a 30 kg girl and a 25 kg boy face each other on friction-free roller blades.the girl pushes the boy,who moves away at a speed of 1.0 m/s.the girl,s speed is _ m/s.

    asked by Anonymous on May 4, 2012
  2. Physics

    A boy throws a 4-kg pumpkin at 8m/s to a 40kg girl on roller skates, who catches it. At what speed does the girl then move backwards?

    asked by Aly on December 31, 2009
  3. Statistics

    Supposed (as is roughly correct) that each child born is equally likely to be a boy or a girl and that sexes of successive children are independent. If we let BG mean that the older child is a boy, and the younger child is a girl,

    asked by Chelsea on May 28, 2011
  4. Math

    Every year in Delaware there is a contest where people create cannons and catapults designed to launch pumpkins as far in the air as possible. the equation y=15+110x-16x^2 can be used to represent the height, y, of a launched

    asked by Veronica on January 21, 2015
  5. Physics

    A 57 kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 1.5 m/s2, determine the magnitude of the acceleration of the boy

    asked by Jessica on October 14, 2012
  1. Physics

    Early one October, you go to a pumpkin patch to select your Halloween pumpkin. You lift the 2.8 kg pumpkin to a height of 1.4 m, then carry it 50.0 m (on level ground) to the check-out stand. Calculate the work you do on the

    asked by Alan on March 15, 2011
  2. Physical Science

    A 30 kg girl and a 25 kg boy face each other on friction-free roller blades. The girl pushes the boy, who moves away at a speed of 1.0 m/s. The girl speed is _______ m/s?

    asked by Donna on March 20, 2009
  3. physics

    a boy of mass 40kg and a girl of 30kg play on a see saw of negligible weight.if the boy sits 270cm from the pivot of the see-saw where must the girl sit to make it balance

    asked by randy on February 8, 2015
  4. Math

    In a family with two children, what are the probabilities of the following outcomes, assuming that the birth of boys and girls is equally likely? a. Both are boys. b. The first is a girl and the second a boy. c. Neither is a girl.

    asked by Punkie on November 18, 2009
  5. Physics

    A 60 kg boy on roller skates moves with a speed of 5 m/s. He runs into a 40 kg girl on skates. Assuming they cling together after the collision, what is their speed?How much kinetic energy was lost in the collision?

    asked by judy on February 21, 2012
  6. physics

    when one boy is sitting 1.20 meter from the center of he seesaw the girl must sit on the other side 1.50 meter from the center to maintain an even balance . however the boy carries an additional mass pf 14 kg and sit 1.80 meter

    asked by shanel on October 11, 2016

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