A pendulum has a length $L=1\mathrm{.}04m.$ It hangs straight down in a jet plane about to take off as shown by the dotted line in the figure. The jet accelerates uniformly, and during that time, the pendulum oscillates about the equilibrium position shown by the solid line, with $D=0\mathrm{.}370m.$ Calculate the magnitude of the plane's acceleration.

$3\mathrm{.}50\frac{m}{s^2}$

Method $1$: Use Newton's $2$nd Law.

Method $2$: Use the Gravitational Equivalence principle. A body in a system with acceleration a behaves as if it were in a gravity field $-$a$.$ The $-$ sign indicates the field is in the direction opposite the acceleration.

Tries $3/12$ Previous Tries

Send Feedback