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
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