An ideal pendulum is often discussed when studying simple harmonic motion.

what are the conditions needed for an ideal pendulum? check all that apply.

1gravitational force acts to pull the pendulum’s mass down.
2the mass of the rod of the pendulum is evenly distributed along the rod.
3the pivot on which the pendulum swings is frictionless.
4the pendulum swings through its equilibrium position as a result of inertia.
5tension acts downward on the pendulum’s mass

Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.