A small test mass is placed at any point inside a thin

PHYSICS · Single correct · AP · Physics C: Mechanics · Force and Translational Dynamics · Force and Translational Dynamics

Problem

A small test mass is placed at any point

P

inside a thin, uniform spherical shell of radius

R

and mass

M

. The gravitational field intensity at

P

is (a)

G\dfrac{M}{R^{2}}

towards the centre (b) zero (c)

G\dfrac{M}{r^{2}}

towards the centre, where

r=OP

(d)

G\dfrac{M r}{R^{3}}

towards the centre