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  1. Thought blocker

    Physics: Post your doubts here!

    9) First find the time, using S = Ut + 0.5t^(2) ; S = 1.25 , U = zero, t = ? That is 1.25= 0.5 x 9.81 x t^(2), t = 0.5 seconds. Now for the Velocity, we know it equals Displacement / time taken ----> V = 10 / 0.5 = 20 m/s so in this type of question either of 2 quantities are given, we just...
  2. Thought blocker

    Physics: Post your doubts here!

    29) c = f * λ We know f = 1 / t so c = 1 / t * λ t = λ / c now it took 3 wavefronts to reach XY to P so t = 3λ / c 34) 36) Its obviously D : As Light intensity increases, its resistace decreases, so as R = V / I , R α V, so As R decreases, V would also decrease across LDR. 37) current is...
  3. Thought blocker

    As physics p1 MCQS YEARLY ONLY.

    You are welcomed anytime with doubts :)
  4. Thought blocker

    As physics p1 MCQS YEARLY ONLY.

    13) Anticlockwise moments= Clockwise moments 20 x 9.81 x60= 100x 10x 9.81 + 50x9.81 x 11772-9810=50x9.81x x=4 cm clockwise 40+4=44 cm 14) this one is tricky, utilize the kinematics equation V^2 = U^2 + 2as so the first drop is u^2 = 0 + 2ah the rebound is 0 = v^2 - 2a(h/2) = v^2 - ah so v^2/u^2...
  5. Thought blocker

    Physics: Post your doubts here!

    I had solve this question, go few pages back or gimme paper link
  6. Thought blocker

    Awesome :)

    Awesome :)
  7. Thought blocker

    As physics p1 MCQS YEARLY ONLY.

    Force = ma = 120 * 10 = 1200 N
  8. Thought blocker

    AS Physics P1 MCQs Preparation Thread.

    Read the books :)
  9. Thought blocker

    As physics p1 MCQS YEARLY ONLY.

    Phew!
  10. Thought blocker

    AS Physics P1 MCQs Preparation Thread.

    No! Coz its the part of inelastic collision. Book parhlo app :P
  11. Thought blocker

    Physics: Post your doubts here!

    3) :D ye ni ata :P ? 5) There are total ten lines b/w 100 to 1000 soo we can assume each line to be 100 yes so, on 40 degree, look it is the fourth line of resistance, hence 400 14) (0.35*3*9.81)+(0.1*1.4*9.81=(0.15*6*9.81)+ans ans=2.8Nm 17) mgsinteta*speed=40% of total power...
  12. Thought blocker

    AS Physics P1 MCQs Preparation Thread.

    9) Here Pi = Pf Pi = 2mu - mu = mu now check in all optons, and see where does Pi = Pf A C D has Pi =Pf now we are asked for Elastic collision, so A 17) Theory based answer. Read the chapter - Matters.
  13. Thought blocker

    <--------------------- [103406:Adeena Shamshir] ^_^

    <--------------------- [103406:Adeena Shamshir] ^_^
  14. Thought blocker

    Physics: Post your doubts here!

    v = (2gh)^1/2 HEIGHT IS 0.72 NOT 0.8! Measure from the base of the ball. Diameter is 0.08. We have to subtract that. Use 1/2mv^2 = initial KE to calculate mass. u = (2gh)^1/2 Again, height is 0.45-0.08 m. KE after impact = 1/2mu^2 = 0.39 J Answer is C
  15. Thought blocker

    Chemistry: Post your doubts here!

    You are :thumbsup:
  16. Thought blocker

    Physics: Post your doubts here!

    P = E / t ( E = 0.5 * m * v^2) P = ( 0.5 * m * v^2 )/ t Now as you know mass = density (ρ) * volume (V) P = ( 0.5 * ρ * V * v^2 ) / t Now you know Volume = Area (A) * Length (l) P = ( 0.5 * ρ * A * l * v^2 ) / t Now you know Velocity = l / t P = 0.5 * ρ * A * v^3 Now substitute the values : Keep...
  17. Thought blocker

    Chemistry: Post your doubts here!

    Easiest approach I would use is to do trial and error with the 4 options, which is fast after some practice. Since B is the answer, I'll use it as example 2P --> 2Q+ R 2.........0 .....0 ..... initial -2x ...... +2x .... +x ..change 2-2x..... 2x ..... x..... final Refer to the steps below if...
  18. Thought blocker

    yes ;) Khule am ;)

    yes ;) Khule am ;)
  19. Thought blocker

    Agreed!

    Agreed!
  20. Thought blocker

    Welcome! Copy Paste, as this all wasn't fitting in one comment, so Just posted one point in one...

    Welcome! Copy Paste, as this all wasn't fitting in one comment, so Just posted one point in one comment, so that it's easy to get it understand, or it can easily be grasped. I used commonsense. Good enough! Isn't it ?
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