Why mass does not affect pendulum?

The reason the simple pendulum has no dependence on mass is because the mass gets to "count" for two different things. (The same thing happens in freefall motion, where all things of all weights fall at the same rate.) For a mass-spring system, the mass still affects the inertia, but it does not cause the force.

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Also, does a heavier pendulum swing faster?

A heavier pendulum will not swing faster. The mass of the pendulum will not have any effect on the period of the swing as we can observe in the next... What happens if you add more weight to a pendulum? When you add a weight to the bottom of the pendulum on the right, you make it heavier. When you add a weight to the middle of the other pendulum, however, you effectively make it shorter. Shorter pendulums swing faster than longer ones do, so the pendulum on the left swings faster than the pendulum on the right.

Why do shorter pendulums swing faster?

where l is the length of string of the pendulum and g is the acceleration due to gravity. So, when l is shorter, the time period of the pendulum decreases which means it has higher frequency which implies that it swings faster. Then, what is pendulum frequency? Frequency equatio. The frequency of a pendulum is how many back-and-forth swings there are in a second, measured in hertz. Frequency f is the reciprocal of the period T: f = 1/T.

What happens if you just let the pendulum swing for awhile?

But what happens if we pull the pendulum bob up to one side and then release it? It will swing from side to side for a long time. At the height of each swing, in the instant when the bob is motionless between upswing and downswing, the system has all potential energy and no kinetic energy.