Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ashna Group Title

A bullet of mass 20g moving with a speed of 150m/s atrikes a block and comes to rest after piercing 10cm into it . Find the avg. force of resistance offered by the block.

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. ashna Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @akash123

    • 2 years ago
  2. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    find out the change in momnetum

    • 2 years ago
  3. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    then average force of resistance= rate of change of momentum= (change in momentum)/ (time interval)

    • 2 years ago
  4. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    so 1st u have to calculate..how much time bullet will take in coming to rest?

    • 2 years ago
  5. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    does it make sense?

    • 2 years ago
  6. ashna Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i guess i dont understand , sorry akash am slow in this , and i want you to help me , how to calculate change in momentum ?

    • 2 years ago
  7. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    change in momentum= (final momentum- initial momentum)

    • 2 years ago
  8. Yahoo! Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    1st find accl

    • 2 years ago
  9. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    i mean... 1st the bullet was moving with a speed of 150m/s then its momentum = m(150), m=20g

    • 2 years ago
  10. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yes use the formula v^2- u^2= 2as

    • 2 years ago
  11. Yahoo! Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    \[V^2 - u^2 = 2as\] \[\frac{ 150*150*100 }{ 2*10 } = a\]

    • 2 years ago
  12. Yahoo! Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    \[F= Ma\]

    • 2 years ago
  13. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    if u find the acceleration, then u can calculate the average resistance force by multiplying acceleration with mass

    • 2 years ago
  14. Yahoo! Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Note mass shuld be in kg 1 gm = 10^-3 kg

    • 2 years ago
  15. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    no need to calculate change in the momentum

    • 2 years ago
  16. Yahoo! Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    hope this helps

    • 2 years ago
  17. Yahoo! Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    According to COD ...this is maths page...and u r asking physics...Question....Plzzz...Go..to physics page

    • 2 years ago
  18. ashna Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    okay let me try , @akash123 and @Yahoo! thank yu !

    • 2 years ago
  19. ashna Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    am sry i din see that .. am sry !

    • 2 years ago
  20. Yahoo! Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    No...Problem.....and welcomee...

    • 2 years ago
  21. akash123 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    :)

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.