HomeworkLib
Question

A body of mass 4.7 kg makes an elastic collision with another body at rest and...

A body of mass 4.7 kg makes an elastic collision with another body at rest and continues to move in the original direction but with 1/3 of its original speed. (a) What is the mass of the other body? (b) What is the speed of the two-body center of mass if the initial speed of the 4.7 kg body was 6.6 m/s?

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

We know that the energy of system remains conserved

So

By Applying Law of conservaton of energy

Let the mass of second body is "m"

And let the speed of mass 4.7 kg be "v"

(a)

By the conservation of kinetic enegy

4.7 * v^{2} = (4.7+m)*(v/3)^{2}

By solving this equation

m = 37.6 kg

(b)

If the speed of 4.7 kg = 6.6 m/s

then as given in question after collision speed will be 1/3 So

Speed of centre of mass of two bodies = 6.6/3 m/s

= 2.2 m/s

0 0
Add a comment
Know the answer?
Add Answer to:
A body of mass 4.7 kg makes an elastic collision with another body at rest and...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A body of mass 2 kg makes an elastic collision with another body at rest and...

    A body of mass 2 kg makes an elastic collision with another body at rest and continues to move in the original direction but with one-fourth of its original speed. a. What is the mass of the other body? b. What is the speed of the two-body center of mass if the initial speed of the 2 kg body was 4 m/s?

  • ch 9 A body of mass 1.2 kg makes an elastic collision with another body at...

    ch 9 A body of mass 1.2 kg makes an elastic collision with another body at rest and continues to move in the original direction but with 1/5 of its original speed, (a) What is the mass of the other body? (b) What is the speed of the two body center of mass if the initial speed of the 1.2 kg body was 6.2 m/s? (a) Number Units (b) Number Units m/s the tolerance is +/-2%

  • 1)A ball moving at 19 m/s makes an off-center elastic collision with another ball of equal...

    1)A ball moving at 19 m/s makes an off-center elastic collision with another ball of equal mass that is initially at rest. The incoming ball is deflected at an angle of 50◦ from its original direction of motion. Find the speed of the first ball after the collision. Answer in units of m/s. 2) Find the speed of the second ball. Answer in units of m/s.

  • a) A billiard ball at rest is struck by another billiard ball of the same mass...

    a) A billiard ball at rest is struck by another billiard ball of the same mass whose speed is 6.0m/s. After an elastic collision the striking ball goes off at an angle of 25 degree with respect to its original direction of motion. Find the angle the struck ball makes with this direction and the final speeds of both balls. b) A particle of mass m, moving with a velocity u, makes a head on collision with a particle of...

  • A neon atom (m=20.0u) makes a perfectly elastic collision with another atom at rest. After the...

    A neon atom (m=20.0u) makes a perfectly elastic collision with another atom at rest. After the impact, the neon atom travels away at a 46.1 ∘ angle from its original direction and the unknown atom travels away at a -58.9 ∘ angle. What is the mass (in u) of the unknown atom? [Hint: You can use the law of sines.]

  • A1 Kg mass moving at 5 m/s makes a center line collision with a 7 Kg...

    A1 Kg mass moving at 5 m/s makes a center line collision with a 7 Kg mass initially at rest. If 3 the collision is elastic derive the speed of the 1 Kg mass after the collision. What fraction of the total kinetic energv is transferred to the 7 Kg mass? Again box answers. 5Mls

  • A cue ball traveling at 6.47 m/s makes a glancing, elastic collision with a target ball...

    A cue ball traveling at 6.47 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30.0° with its original direction of travel. (a) Find the angle between the velocity vectors of the two balls after the collision. 90 ° (correct) (b) Find the speed of each ball after the collision. cue ball     m/s target ball     m/s

  • w Lower. Hinge ha 7 Kg mass initially at rest. If ter the collision. What fraction...

    w Lower. Hinge ha 7 Kg mass initially at rest. If ter the collision. What fraction of 3 A 1 Kg mass moving at 5 m/s makes a center line collision with a 7 kg mass the collision is elastic derive the speed of the 1 kg mass after the collision. the total kinetic energy is transferred to the 7 kg mass? Again box answers. N 7 Kg Ik, 5 mis

  • A 1kg mass moving at 5m/s makes a Center line collision with 7 kg mass initially...

    A 1kg mass moving at 5m/s makes a Center line collision with 7 kg mass initially at rest. if the collision is elastic derive the speed of 1kg mass after the collision. What fraction of the total kinetic energy is transfered to the 7kg mass?

  • A block of mass m= 4.4 kg, moving on frictionless surface with a speed v1=9.2 m/s makes a sudden perfectly elastic collision with a second block of mass M

    A block of mass m= 4.4 kg, moving on frictionless surface with a speed v1=9.2 m/s makes a sudden perfectly elastic collision with a second block of mass M, as shown in the figure. The second block is originally at rest. Just after the collision, the 4.4-kg block recoils with a speed of vf=2.5 m/s What is the mass M of the second block?

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT