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Physics Numerical for class 9 motion & other chapters with answers & [PDF]

Last updated on December 12th, 2023 at 01:53 pm

Numericals based on simple Pendulum motion

61) Two simple pendulums A and B have equal lengths, but their bobs weigh 50 gf and l00 gf respectively. What would be the ratio of their time periods? Give a reason for your answer.

Solution: solution Q61

62) Two simple pendulums A and B have lengths of 1·0m and 4·0 m respectively at a certain place. Which pendulum will make more oscillations in 1 minute? Explain your answer.

Solution: solution Q62

63)A simple pendulum completes 40 oscillations in one minute. Find its (a) frequency, (b) time period.

Solution: solution Q63

64) The time period of a simple pendulum is 2 s. What is its frequency? What name is given to such a pendulum?

Solution: solution Q64

65) A seconds’ pendulum is taken to a place where the acceleration due to gravity falls to one-fourth. How is the time period of the pendulum affected, if at all? Give reason. What will be its new time-period?

Solution: solution Q65

66) Find the length of a seconds’ pendulum at a place where g = 10 m/s2 (Take  ∏= 3·14).

Solution: solution Q66

67) A pendulum completes 2 oscillations in 5 s. (a) What is its time period? (b) If g = 9·8 m /S^2, find its length.

Solution: solution Q67

68) Compare the time periods of two pendulums of length 1 m and 9 m

Solution: solution Q68

69) The time periods of two simple pendulums at a place are in a ratio of 2:1. What will be the ratio of their length?

Solution: solution Q69

70) It takes 0·2 s for a pendulum bob to move from the mean position to one end. What is the time period of the pendulum?

Solution: solution Q70

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71) How much time does the bob of a seconds’ pendulum take to move from one extreme of its oscillation to the other extreme?

Solution: solution Q71

6 thoughts on “Physics Numerical for class 9 motion & other chapters with answers & [PDF]

  1. I find this collection of physics problems very useful. Our class teacher has also prescribed us to solve these problems. Thank you.

  2. Many thanks for putting in the effort for students like me. I am solving these problems even for the competitive exams I will have soon.

  3. You have a good amount of materials for physics problems. I found this site very helpful. One request: can you post chemistry problems as well?

  4. Thanks for your comments and suggestion, Shilpa. We will certainly plan for it.

  5. Hi Ayan, Good to know this. Best wishes.

  6. Thanks Dip for your inspiring words.

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