Question

Inside a mystery box is either a pendulum or a spring. You cannot view it directly, but you can collect data from it. When it is at rest, it oscillates with a period of 1 second. When it is accelerating in an elevator it oscillates with a period of 2 seconds. Which type of oscillator is it?You cannot determine without knowing the mass.You cannot determine without knowing the magnitude of the acceleration.SpringPendulum

Answer 1

Time period of a pendulum is given by --

$T=\text{ 2}\pi\sqrt[\placeholder{⬚}]{\frac{l}{g+a}};$

According to problem

When it is at rest, it oscillates with a period of 1 second. When it is accelerating in an elevator it oscillates with a period of 2 seconds.

From above equation we can conclude that time period of pendulum depends on acceleration and it is inversely proportional .

So its is a Pendulum.

final answer is :- pendulum