You have seen almost every physical system with a stable equilibrium configuration behaves as a simple harmonic oscillator for small disturbances from equilibrium. given certain features of such a system and its motion, calculate others.

Positrons are spontaneously emitted from the nuclei of

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Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.