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SS2: PHYSICS - 1ST TERM

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  1. Scalars & Vectors | Week 1
    5 Topics
    |
    1 Quiz
  2. Equations of Motion | Week 2
    3 Topics
    |
    1 Quiz
  3. Projectile | Week 3
    5 Topics
  4. Equilibrium of Forces I | Week 4
    4 Topics
  5. Equilibrium of Forces II | Week 5
    4 Topics
  6. Stability of a Body | Week 6
    4 Topics
    |
    1 Quiz
  7. Simple Harmonic Motion (SHM) | Week 7
    4 Topics
  8. Speed, Velocity & Acceleration & Energy of Simple Harmonic Motion | Week 8
    5 Topics
    |
    1 Quiz
  9. Linear Momentum | Week 9
    6 Topics
    |
    1 Quiz
  10. Mechanical Energy & Machines | Week 10
    2 Topics
    |
    1 Quiz



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Mass on a String:

Let a mass M be hung from the lower end of a spring and the other end firmly clamped to a rigid support.

When the mass originally at position O (the equilibrium position) is pulled down to D and then released, it is observed, to move up and down in a regular pattern.

mass on spring
Motion of a mass suspended from a spring.

If the distance travelled on both sides of the equilibrium position is equal i.e. OD = OC, then the maximum displacement on either side of equilibrium are called the Amplitude of Oscillations.

Positive Amplitude – C
Equilibrium Position – O
Negative Amplitude – D

shm spring amplitude gif

Using Hooke’s law, the restoring force, F, in the spring would be directly proportional to the extension, e, produced, provided the spring is not deformed.

F = -Ke

K is the spring constant.

Characteristics of Simple Harmonic Motion:

1. It is periodic Oscillatory motion about an equilibrium position.
2. The displacement is a sinusoidal function of time. It ranges from O to maximum displacement.
3. The velocity is maximum when displacement is O (equilibrium point).

pend

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