Plz write activity 11.7 from class 9 ncert science textbook, work & energy with aim, material, procedure, conclusion and result

Dear Student,
Such questions are made for enhancing the self creative skills and should be tried answering on your own. However, here are a few points that will help you in framing your answer: .
  • Set up the apparatus as shown in Fig. 11.5.
  • Place a wooden block of known mass in front of the trolley at a convenient fixed distance.
  • Place a known mass on the pan so that the trolley starts moving.

  • The trolley moves forward and hits the wooden block.
  • Fix a stop on the table in such manner that the trolley stops after hitting the block. The block gets displaced.
  • Note down the displacement of the block. This means work is done on the block by the trolley as the block has gained energy.
  • From where does this energy come?
  • Repeat this activity by increasing the mass on the pan. In which case is the displacement more?
  • In which case is the work done more?
  • In this activity, the moving trolley does work and hence it possesses energy.

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