For those going on to A levels after your Os
And also for those going from J1 to J2
This is an extremely common H2 physics questions on Dynamics
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An 18-g rifle bullet travelling 230 m/s buries itself in a 3.6-kg pendulum hanging on a 2.8-m-long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's displacement.
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Hint: You need both Principle of conservation of momentum and Principle of conservation of energy to solve this question.
Attempt before looking at the answer here
Another question on Simple Harmonic Motion
A massless spring with spring constant 19 N/m hangs vertically. A body of mass 0.20 kg is attached to its free end and then released. Assume that the spring was un-stretched before the body was released. Find
a) How far below the initial position the body descends, and the
b) Frequency of the resulting Simple Harmonic Motion.
c) Amplitude of the resulting Simple Harmonic Motion.