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  1. J

    Circular Motion Plane Loop

    thanks i think its right :)
  2. J

    Circular Motion Plane Loop

    Homework Statement someone is flying a plane and he is being chased and at the bottom of the loop his guages say he is traveling at 180km/h he is sitting on a bathroom scale which says he weighs 4 times what he normally does, what is the radius of the loop in meters? Homework Equations...
  3. J

    Projectile Motion Question

    woops a typo there and i didnt round on paper i just wanted to make sure i had it right thanks alot !
  4. J

    Projectile Motion Question

    [SOLVED] Projectile Motion Question Homework Statement a swimmer moving at 1.80m/s dives off a pier and hits the water .80 m from the edge of the pier how high is the pier above the water Homework Equations Vx=change X /change Time change Y = Vyi . change Time +1/2 a . (change time)^2...
  5. J

    Billiards ball collision

    also is there a different formula to use for this when its on an angle, i know momentum before has to equal momentum after as does kinetic energy, mind you its not asking for kinetic, only speed, the balls are the same size so in the momentum formula we can get rid of the mass?, and its obvious...
  6. J

    Billiards ball collision

    Homework Statement 2 identical biliards balls collde after a glancing collision determine the speed of the other ball, Homework Equations MaVa + MbVb = MaVa' + MbVb' ? The Attempt at a Solution is this just as simple as the momentum formula before and after, or am I forgetting...
  7. J

    2 more basic problems

    actually, it seems like the answer becomes 2.75kg which would mean in the direction of M1 which wouldnt be what we wanted so actually we could get it moving in the right direction by adding 2.8kg of weight to m2 does that make more sense then i can just figure out the acceleration of the...
  8. J

    2 more basic problems

    Could someone please confirm that there is actually movement if it let go it is not equaling 0. i'm doubting myself again
  9. J

    2 more basic problems

    ? noone i dont think it stays at rest, i think my books wrong can anyone comfirm this?
  10. J

    2 more basic problems

    so my book is saying that it stays at rest? is it correct, because thats not the answer i am getting
  11. J

    2 more basic problems

    muk is 0.19 and mus is 0.42
  12. J

    2 more basic problems

    so i do all that and if they equal the same the system wont move correct? so i know Fn is 417.87 for block 1 and i know the right force is 343.35N so to find left components i can go Fleft + Ff so 194.85 +175.5 that equals 369 though which would mean it would move down the ramp
  13. J

    2 more basic problems

    anyone, id love to get this unit done with today, last question to do, still stumped and looked back through the textbook
  14. J

    2 more basic problems

    i know you have to see if fa is greater then Ff but i dont know what formulas to use..any help
  15. J

    2 more basic problems

    alright and the other problem i had was simple it is a pulley question where 2 blocks are connected block one is on the incline and weighs 47kg and block 2 is on the other end of the pulley and weighs 35kg, theres 4 parts but the only one i need help with is a will the blocks move if m2 is...
  16. J

    2 more basic problems

    yea the book says 15 but whatever if you agree with me thats all that matters.
  17. J

    2 more basic problems

    so force dog cosØ is the same as the sin i mentioned when i edited my post when measuring off east? nice so FF=229 so i can go mu k equals 229/1422.45 which gives me .16 the book is saying .15x10(2) im confused
  18. J

    2 more basic problems

    so we can say Ff = whatever the F of the dogs combined is or the - of it, and i dont know what i missed on the forces is it supposed to be sin? or the angle part should i be starting my measurements at E ? anglewise this gives me 1) force of 79.98 2) force of 74 3) force of 75
  19. J

    2 more basic problems

    constant velocity implies no acceleration which means net force is 0 but to find µ i need Ff do I not? did i do the forces of the dog right? Fn would equal 1422.45 correct
  20. J

    2 more basic problems

    actually on thinking of it i was using Fg to find the Ff but now im stuck as to how im finding the Ff
  21. J

    2 more basic problems

    [SOLVED] 2 more basic problems 3 dogs are pulling a sled with a combined weight of 145 kg the dogs are pulling 1) pulling at a force of 83N at 15.5(degrees) left of forward 2) pulling at a force of 75N at 9 (degrees) right of forward 3) pulling at a force of 77N at 12(degrees) right of...
  22. J

    Incline max angle physics problem

    ok what i did was used the formula F=mg sin(Theta) and punched in 20=20(9.81) sin (theta) 20/196.2=sin(theta) sin-1(.101...)=theta theta = 5.85 ? so when i get this angle is that the maximum it can be?
  23. J

    Incline max angle physics problem

    im still confused a bit the angle is it 5.8ish im not sure exactly what im missing f=mg sin(theta)
  24. J

    Incline max angle physics problem

    we have to design an entrance ramp for the new megamart. the maximum force customers will exert without complaint is 20N, ignoring friction at what maximum angle should the ramp be built assuming a full 20 kg grocery cart? i've almost drawn at a blank it just seems like the question is...
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