9th Class Science Sample Paper Sample Paper - 5 Term - 1

  • question_answer
      A car falls off a ledge and drops to the ground in 1 s. Let (for simplifying the calculation). (a) What is its speed on striking theground? (b) How high is the ledge from theground? (c) What is its average speed during the 1 s?


      (a) Here initial velocity of car, u = 0, time of fall, and acceleration for car, a = acceleration due to gravity Final speed of car when striking the ground                                                                                                                                                                (1) (b) Height of the ledge = total distance covered by car                                                                                                                                                       (1) (c) Average speed Or Average Speed                                                                                                                          (1)

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