AP® Physics C: Mechanics

Free Version

Upgrade subject to access all content

Easy

A Hanging Mass Delicately Placed on an Incline

APPHMC-MKGGLR

TOMIHIRO ONO. Created for Albert.io. Copyright 2016. All rights reserved.

Consider the above system, in which a mass $m$ is balanced on a FRICTIONLESS incline with the help of a vertical cord exerting tension $T$ directly upwards on the mass.

What is the normal force $F_N$ exerted by the incline on $m$?

The incline makes an angle of $30.0 ^o$ with the horizontal.

A

$F_N = 0$

B

$F_N = mg - T$

C

$F_N = \cfrac {mg - T} {sin \theta}$

D

$F_N = mg tan \theta$

E

$F_N = T tan \theta$