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# Books in an Elevator

APPHMC-7GLKP4

An elevator accelerates upwards, with $a = 1.0 m/s^2$. Inside the elevator are two stacked books, each $2.0 kg$ in mass.

How much normal force does the bottom book exert on the top book?

A

$17.62 \ N$

B

$19.62 \ N$

C

$21.62 \ N$

D

$35.24 \ N$

E

$39.24 \ N$