Physics

Problem

A simple pendulum of length

1.0\,\text{m}

has a time period of

2.0\,\text{s}

when observed in a stationary laboratory on Earth (

g = 9.8\,\text{m\,s}^{-2}

). Which one of the following isolated changes, carried out independently, would make the time period less than

2.0\,\text{s}

? a) Replacing the light string with a steel wire of the same length and negligible thickness b) Moving the entire setup to the top of a

2\,\text{km}

high mountain c) Placing the setup inside a lift that accelerates upward at

2\,\text{m\,s}^{-2}

d) Doubling the mass of the bob