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  1. student4563543

    Physics: Post your doubts here!

    is B the answer?
  2. student4563543

    Physics: Post your doubts here!

    thanks alot man :thumbsup:
  3. student4563543

    Physics: Post your doubts here!

    Initial kinetic energy of trolley = 4J Consider the 1st case. We need to consider the initial 4J here. Final kinetic energy = 8J Work done by force F (= Fs) = 8 – 4 = 4J So, Fs = 4J Consider the 2nd case. Work done by force 2F = (2F) (2s) = 4(Fs) = 4(4) = 16J since Fs = 4J Total kinetic...
  4. student4563543

    Physics: Post your doubts here!

    Ans is D O/N/13 V13
  5. student4563543

    Physics: Post your doubts here!

    Ans is A 9702_13 2016
  6. student4563543

    Physics: Post your doubts here!

    vertical: v=u+at v=8+(-1.62)(9) v=-6.6ms-1 horizontal: v=4ms-1 Resultant Velocity: Sqroot of 4^2+6.6^2 = 7.7ms-1
  7. student4563543

    Physics: Post your doubts here!

    A truck of mass 500kg moves from rest at the top of a section of track 400 m long and 30 m high, The frictional force acting on the truck is 250 N throughout its journey.What is the final speed of the truck? Help please. this is from october november 2016 varient 1 answer should be 14ms-1
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