Mechanics questions | form five Physics

1. Briefly explain why the motion of a simple pendulum is not strictly simple harmonic?
2. Why the velocity and acceleration of a body executing simple harmonic motion (S.H.M.) are out of phase?

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UNSOLVED

A body of mass 0.30​ kg executes simple harmonic motion with a period of 2.5sec and amplitude of 4.0×10^-2​ m . ​ Determine the:

1. Maximum velocity of the body.
2. Maximum acceleration of the body.
3. Energy associated with the motion.

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UNSOLVED

A particle of mass 0.25​ kg vibrates with a period of 2.0 sec. If its greatest displacement is 0.4​ m what is its maximum kinetic energy?

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UNSOLVED

1. Define moment of inertia of a body.
2. Briefly explain why there is no unique value for the moment of inertia of a given body?

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UNSOLVED

1. State the principle of conservation of angular momentum.
2. A horizontal disc rotating freely about a vertical axis makes 45 revolutions per minute. A small piece of putty of mass 2.0×10^​-2​ kg falls vertically onto the disc and sticks to it at a distance of 5.0×10^-2​ m from the axis. If the number of revolutions per minute is thereby reduced to 36, calculate the moment of inertia of the disc.

Answer / Solution

UNSOLVED