Recent content by MilenaMath

  1. M

    What is the probability of getting 1,2,3,4 when 5 dice are thrown and

    I need to get exactly 1,2,3,4(order doesnt matter) and the fifth dice can be whatever number but 5
  2. M

    What is the probability of getting 1,2,3,4 when 5 dice are thrown and

    What is the probability of getting 1,2,3,4 when 5 dice are thrown and one of them is not 5.(the order of 1,2,3,4 doesnt matter) I am really confused: So I computed chances of getting correct numbers that is 1/6^4 times 5/6,then I multiply this by 4 times 5! Am I right?
  3. M

    Springs,Hooke's Law

    I found out my mistake: So the right way to proceed is We apply force ##F_x## to the spring and let's assume it stretches to length ##x_n-L## then we have ##F_x=k(x_n-L)## .Then we cut the spring into half and both of them would stretch to##x/2## length when ##F_x## force is applied but both of...
  4. M

    Springs,Hooke's Law

    My solution was: I assumed the F=kx,k is the spring constant of the initial spring,then I said ##k_1= F/(x/2)## so is ##k_2## and thus ##k_1=k_2=2k => k_t=4k## But he says my mistake is that I cant say ##k_1= F/(x/2)## but the rest is ok
  5. M

    Springs,Hooke's Law

    But the correct answer is 4K,I did the same thing,but the professor says 4K,I cant find the mistake
  6. M

    Springs,Hooke's Law

    A spring with spring constant k and of unstretched length L is cut in half and both parts are put side by side. Determine the total spring constant of the parallel springs. Can anyone explain me the solution to this.
  7. M

    Mechanics: Straight line motion

    True! then I get constant as b/[-2T^2]. Thank you! (Since car is initially at rest I assume v(0)=0)
  8. M

    Mechanics: Straight line motion

    1. A car is sitting at a stop light and then accelerates from rest when the light turns green.The acceleration of the car is a combination of forward acceleration but also slowing down due to drag forces.The final total accelaration of the car has the form a(t)=b/(t+T)^3 with constants b=2000 m...
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