physics

posted by .

Child X throws 0.5 kg of Play
Dough at Child Y at 0.40 m/s at the same time that Child Y throws 0.8 kg of Play Dough at Child X at
0.20 m/s. The two masses of Play Dough collide and stick. What is the resulting speed and direction
of the Play Dough? What are the kinetic energies of the two masses before the collision? What is
the kinetic energy of the combined mass after the collision?

  • physics -

    Since the masses stick together, there is conservation of momentum but no conservation of energy.

    Let x be the new velocity.

    Hence, 0.5*0.4 + 0.8*(-0.20) = (0.5+0.8)*x

    X = (0.2-0.16)/1.3 = 0.0307 m/s

    KE = 0.5*1.3*0.0307^2 = 0.000615 J.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A 45.00 kg child standing on a frozen pond throws a 0.60 kg stone to the east with a speed of 5.80 m/s. Neglecting friction between child and ice, what is the speed (in m/s) of the child after throwing the stone?
  2. cultural diversity

    i have 3 questions that i am stuck on and i really need to see if this site can help me with this ones.this my first time on here. 1.a young asian child would probably be less inclined to engage in backchanneling than a middle-class …
  3. Early Education

    The single most important factor in determining the quality of an educational program is the: A. talk to parents/guardians about their child's behavior. B. ask other teachers about their observations of the child. C. compare the child …
  4. Observing development of the young child

    The type of pretend play in which Preschool children role play with others is called?
  5. physics

    While sitting on a frozen pond, a 35kg child throws a 0.5kg ball horizontally at a velocity of +6m/s. Calculate the resulting velocity of the child across the ice.Suppose the child throws the ball upward instead, at a 25o angle above …
  6. Cultual Diversity

    1.A mother's eventual submission to her young child's repquests for the toy matchbox car in the hobby shop is representative of the ______ parenting style. a. laissez faire b.authoritarian c.Victorian d. democratic 2.A Native American …
  7. ece

    On the Child Development Checklist, you've checked the item "Spends time watching others at play" for a preschool child in your group. Which of the following is the most likely reason for the child's behavior?
  8. child care

    When a preschool child experiences sadness, the best way for a teacher to help is by A. distracting the child by giving them something to do. B. encouraging the child to play with others. C. demonstrating sympathy in words and deeds. …
  9. concept development

    Choose the best example of a specific task assessment. A. Give a child two groups of marbles: a group of five and a group of eight. Then ask the child which group has more marbles. B. Ask a five-year-old child to clean the play area …
  10. math

    each student needs 2/5 of a cup of play dough to build a house. How many cups of play dough are needed for 9 students?

More Similar Questions