On Earth, a mass of stretches a certain vertical spring by . The same spring is used…

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics

Problem

On Earth, a mass of

2\,\text{kg}

stretches a certain vertical spring by

1.5\,\text{cm}

. The same spring is used inside a lift that is ascending with an acceleration of

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

. If an unknown mass attached to the spring produces an extension of

2.1\,\text{cm}

in the lift, the mass is closest to (a)

3.5\,\text{kg}

(b)

2.8\,\text{kg}

(c)

2.3\,\text{kg}

(d)

1.8\,\text{kg}