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DSE Physics

DSE Physics . Mechancis. constant speed. 12 N. 2 N .

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DSE Physics

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  1. DSE Physics

  2. Mechancis

  3. constant speed 12 N 2 N A block on a rough horizontal surface is moving to the left with constant speed under two horizontal forces 2 N and 12 N indicated as shown. If the force of 12 N is suddenly removed, what is the net force acting on the block at that instant ?

  4. v /m s−1 4 3 Q 2 1 t /s P 0 1 2 3 4 5 −1 −2 Two particles P and Q start from the same position and travel along the same straight line. The figure shows the velocity-time (v-t) graph for P and Q. Which of the following descriptions about their motion is/are correct ? (1) At t = 1 s, P changes its direction of motion. (2) At t = 2 s, the separation between P and Q is 4 m. (3) At t = 4 s, P and Q meet each other.

  5. G 154 N Y ground X 0.5 m 0.7 m What is the reaction acting on the wheel X from the ground ?

  6. Wave

  7. Electricity and Magnetism

  8. mag. force on A I I I I A B

  9. Radioactivity and Nuclear Energy

  10. Energy and Use of Energy

  11. Energy and Use of Energy

  12. Medical Physics

  13. Medical Physics

  14. Assessment

  15. Assessment

  16. very careful in doing calculations • eager to investigate deep into questions and difficult concepts • able to associate day-to-day phenomena with physics • prepared to work very hard to solve a lot of problems • willing to accept challenges and won’t easily give up To become a good student in physics, you have to be

  17. The End

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