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CBSE Class 12 Physics Simple Harmonic Motion Solved Examples. Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks.
Ex.1. Find the time period of small oscillations in a horizental plane performed by a ball of mass 40 g fixed at the middle of a horizontally stretched string 1.0 m in length. The tension of the string is assumed to be constant and equal to 10 N.
Sol.: Consider a ball of mas m placed at the middle of a string of length l and tension T. The components of tension T towards mean position is T cosθ. The force acting on the ball = 2 T cosθ
Ex.2. If a tunnel is dug through the earth from one side to the other side along a diameter. Show that the motion of a particle dropped into the tunnel is simple harmonic motion. Find the time period. Neglect all the frictional forces and assume that the earth has a uniform density. G = 6.67 × 10–11 Nm2; kg–2
density of earth = 5.51 × 103 kg m–3
Sol.: Consider a tunnel dug along the diameter of the earth.A particle of mass m is placed at a distance y from the centre of the earth. There will be a gravitational attraction of the earth experienced by this particle due to the mass of matter contained in a sphere of radius y. Force acting on particle at distance y from centre F = GM100/R3.y
Ex.3. Two light springs of force constant k1 and k2 and a block of mass m are in one line AB on a smooth horizontal table such that one end of each spring is fixed on rigid supports and the other end is free as shown in figure.
The distance CD between the free ends of the springs is 60 cm. If the block moves along AB with a velocity 120 cm/sec in between the springs, calculate the period of oscillation of the block. (k1 = 1.8 N/m, k2 = 3.2 N/m, m = 200 gm) if initially block is mid way of CD then,
Sol.: If initially block is mid way of CD their the time period T is equal to sum of time to travel 30 cm to right, time in contact with spring k2, time to travel 60 cm to left, time in contact with spring k1 and time to travel 30 cm to right.
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Free CBSE Study Guides: Class 12 Physics Simple Harmonic Motion
Comprehensive Study Resources for Simple Harmonic Motion
Access comprehensive study material for Simple Harmonic Motion, including revision notes, concept maps, and high-probability questions. These resources are designed in alignment with the latest 2026 CBSE syllabus for Class 12 Physics to support effective exam preparation.
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Built using official NCERT guidelines for Class 12 Physics, these materials provide reliable academic support. Integrating past examination questions and step-by-step solutions helps students understand official CBSE grading criteria.
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Maximize your grade potential by utilizing Class 12 Physics practice papers in tandem with these structured notes. All printable assignments and interactive mock tests on our platform are updated for the 2026 session and available free of charge.
FAQs
Our advanced study package for Simple Harmonic Motion includes detailed concepts, diagrams, Mind Maps, and explanation of complex topics to ensure Class 12 students learn as per syllabus for 2026 exams.
The Mind Maps provided for Simple Harmonic Motion act as visual anchors which will help faster recall during high-pressure exams.
Yes, teachers use our Class 12 Physics resources for lesson planning as they are in simple language and have lot of solved examples.
Yes, You can download the complete, mobile-friendly PDF of the Physics Simple Harmonic Motion advanced resources for free.
Yes, our subject matter experts have updated the Simple Harmonic Motion material to align with the rationalized NCERT textbooks and have removed deleted topics and added new competency-based questions.