Inside an elevator a student stands on a wooden box that rests directly on a scale

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

Problem

Inside an elevator a

65\,\text{kg}

student stands on a

25\,\text{kg}

wooden box that rests directly on a scale. While the elevator accelerates upward at

1.5\,\text{m/s}^2

, what force does the scale exert on the box? (Take

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

.) (a)

1.3\times10^{3}\,\text{N}

(b)

1.0\times10^{3}\,\text{N}

(c)

7.5\times10^{2}\,\text{N}

(d)

8.8\times10^{2}\,\text{N}